Tevatron reverse injection (open access)

Tevatron reverse injection

In the new injection scenario antiprotons are injected onto a helical orbit in the Tevatron in order to avoid the detrimental effects of the beam-beam interaction at 150 GeV. The new scenario required changes in the tuning procedure. Antiprotons are too precious to be used for tuning, therefore the antiproton injection line has to be tuned with protons by reverse injecting them from the Tevatron into the Main Pang (MR). Previously, the reverse injection was performed in one supercycle. One batch of uncoalesced bunches was injected into the Tevatron and ejected after 40 seconds. Then the orbit closure was performed in the MR. In the new scheme the lambertson magnets have to be moved and separator polarities have to be switched, activities that cannot be completed in one supercycle. Therefore, the reverse injection sequence was changed. This involved the redefinition of TVBS dock event $D8 as MRBS $D8 thus marking it possible to inject 6 proton batches and eject them one at a time on command, performing orbit closure each time in the MR.
Date: June 25, 1993
Creator: Saritepe, S. & Annala, G.
Object Type: Report
System: The UNT Digital Library
Thermal distortion tests of aluminum and stainless steel plates (open access)

Thermal distortion tests of aluminum and stainless steel plates

An important upgrade to the STAR detector at the Brookhaven National Laboratory RHIC accelerator will be an electromagnetic calorimeter. One design being considered for this calorimeter involves cast lead modules covering {Delta}{phi} = 6{degree} and 0 {le} {vert_bar}{eta}{vert_bar} {le} 1. These modules would consist of alternating layers of lead and sheets of plastic scintillator. The gaps for scintillator between the layers of lead would be created by parallel aluminum plates of thickness {approx_equal}6.6 mm = 0.260in. in the mold for the modules. These plates would need to be machined or ground to be reasonably flat, perhaps to {plus_minus}0.003in., and of uniform thickness from plate to plate. These requirements are imposed by the need to remove the plates from the casting after cooling, and to have good uniformity of the lead layer thickness, which gives good performance for the modules as a calorimeter. Aluminum was chosen for the plates because of its high coefficient of thermal expansion. An important cost in this calorimeter design is associated with the machining or grinding of the plates to proper thickness and flatness. In most cost estimates, it has been assumed that the mold parts could be used many times. This note describes a simple …
Date: June 25, 1993
Creator: Bielick, E.; Fornek, T.; Spinka, H. & Underwood, D.
Object Type: Report
System: The UNT Digital Library
US energy industry financial developments, 1993 first quarter (open access)

US energy industry financial developments, 1993 first quarter

Net income for 259 energy companies-- including, 20 major US petroleum companies-- rose 38 percent between the first quarter of 1992 and the first quarter of 1993. An increased level of economic activity, along with colder weather, helped lift the demand for natural gas. crude oil, coal, and electricity. The sharp rise in the domestic price of natural gas at the wellhead relative to the year-ago quarter was the most significant development in US energy during the first quarter. As a consequence of higher natural gas prices, the upstream segment of the petroleum industry reported large gains in income, while downstream income rose due to higher refined product demand. Increased economic activity and higher weather-related natural gas demand also led to improvements in income for the rate-regulated energy segment. However, declining domestic oil production continued to restrain upstream petroleum industry earnings growth, despite a moderate rise in crude oil prices.
Date: June 25, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Cratering rates from lunar xenospherules (open access)

Cratering rates from lunar xenospherules

The goal of this project is to obtain the time history of impacts on the moon, with emphasis on recent impacts. In particular, the project could prove (or disprove) the existence of comet sores and provide the dates when they occurred.
Date: May 25, 1993
Creator: Muller, R. A.
Object Type: Report
System: The UNT Digital Library
D0 Solenoid Upgrade Project: Pressure Ratings for Some Chimney and Control Dewar Componenets (open access)

D0 Solenoid Upgrade Project: Pressure Ratings for Some Chimney and Control Dewar Componenets

Pressure rating calculations were done for some of the chimney and control dewar components. This engineering note documents these calculations. The table below summarizes the components looked at, and what pressure rating are. The raw engineering calculations for each of the components is given.
Date: May 25, 1993
Creator: Rucinski, R.
Object Type: Report
System: The UNT Digital Library
Electric power monthly, May 1993 (open access)

Electric power monthly, May 1993

The Electric Power Monthly (EPM) is prepared by the Survey Management Division; Office of Coal, Nuclear, Electric and Alternate Fuels, Energy Information Administration (EIA), Department of Energy. This publication provides monthly statistics at the US, Census division, and State levels for net generation, fossil fuel consumption and stocks, quantity and quality of fossil fuels, cost of fossil fuels, electricity sales, revenue, and average revenue per kilowatthour of electricity sold. Data on net generation, fuel consumption, fuel stocks, quantity and cost of fossil fuels are also displayed for the North American Electric Reliability Council (NERC) regions.
Date: May 25, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
High temperature alkali corrosion of ceramics in coal gas. Quarterly progress report No. 7, March 1, 1993--June 1, 1993 (open access)

High temperature alkali corrosion of ceramics in coal gas. Quarterly progress report No. 7, March 1, 1993--June 1, 1993

Corrosion kinetics of SiC were investigated from 950 to 1100C at 0.63 vol% alkali vapor concentration. Corrosion rate in alkali is 10{sup 4} to 10{sup 5} times faster than oxidation rate of SiC in air. Activation energy of the alkali corrosion is 406 kj/mol, indicating a high sensitivity to temperature changes. Overall reaction appears to be controlled by the oxidation of SiC. The alkali corrosion kinetics of Si{sub 3}N{sub 4} from 950 to 1050{degrees}C were also examined in the same atmosphere (0.63 vol% alkali vapors). Reaction thickness of Si{sub 3}N{sub 4} appears to vary linearly with reaction time from 950 to 1050C, suggesting that the alkali corrosion process is controlled by the oxidation of Si{sub 3}N{sub 4}. At 1050{degrees}C, the alkali-enhanced oxidation of Si{sub 3}N{sub 4} is approximately 10{sup 7} times faster than the oxidation of Si{sub 3}N{sub 4} in dry oxygen. Compared to SiC corroded in the same alkali atmosphere, Si{sub 3}N{sub 4} seems to be less alkali-resistant than SiC. Phase relations of the Na{sub 2}O-Al{sub 2}TiO{sub 5} vertical section from 5--40 wt% Na{sub 2}O and 840-1100C were studied. Phase analysis indicates that this section is not a true binary system. A tentative phase diagram for the Na{sub 2}O-Al{sub …
Date: May 25, 1993
Creator: Pickrell, G. R.; Sun, T. & Brown, J. J.
Object Type: Report
System: The UNT Digital Library
Inhibition of retrogressive reactions in coal/petroleum co-processing. Final technical report (open access)

Inhibition of retrogressive reactions in coal/petroleum co-processing. Final technical report

The objective of this study was to examine the processes in coal/petroleum coprocessing systems which led to coke formation. Specifically, the interactions between the petroleum residue and coal, leading to retrogressive products, were investigated. Five coals were reacted with five model compounds in order to investigate the coal conversions in a variety of solvents and to determine the role of the solvent in promoting or inhibiting coal conversion. The selected model compounds range from paraffinic to fully aromatic and were chosen as representative of types of compounds that are found in petroleum residua. Coprocessing experiments were conducted using the five coals and three petroleum residua. The effect of temperature on coal conversions was crucial. The coal conversions at 350 and 400{degree}C seem to be governed by the nature of the coal and to a lesser extent by the petroleum residua. Negative coal conversions were observed above 400{degree}C indicating that retrogressive processes had occurred. At temperatures higher than 400{degree}C, the petroleum residua undergo physical and chemical transformations and the influence of the petroleum residua on coal conversions is significant. The structural features of the residues indicated that the residues were predominately coal-derived. An overall increase in aromaticity was observed with increasing …
Date: May 25, 1993
Creator: Schobert, H. H. & Tomic, J.
Object Type: Report
System: The UNT Digital Library
Quasi-elastic neutron scattering studies of protein dynamics (open access)

Quasi-elastic neutron scattering studies of protein dynamics

Results that shed new light on the study of protein dynamics were obtained by quasi-elastic neutron scattering. The triple axis instrument H-9 supplied by the cold source was used to perform a detailed study of the quasi-elastic spectrum and the Debye-Waller factor for trypsin in powder form, in solution, and in crystals. A preliminary study of myoglobin crystals was also done. A new way to view the results of quasi-elastic scattering experiments is sketched, and the data on trypsin are presented and analyze according to this new picture.
Date: May 25, 1993
Creator: Rorschach, H.E.
Object Type: Report
System: The UNT Digital Library
Quasi-elastic neutron scattering studies of protein dynamics. Progress report, November 1, 1992--May 25, 1993 (open access)

Quasi-elastic neutron scattering studies of protein dynamics. Progress report, November 1, 1992--May 25, 1993

Results that shed new light on the study of protein dynamics were obtained by quasi-elastic neutron scattering. The triple axis instrument H-9 supplied by the cold source was used to perform a detailed study of the quasi-elastic spectrum and the Debye-Waller factor for trypsin in powder form, in solution, and in crystals. A preliminary study of myoglobin crystals was also done. A new way to view the results of quasi-elastic scattering experiments is sketched, and the data on trypsin are presented and analyze according to this new picture.
Date: May 25, 1993
Creator: Rorschach, H. E.
Object Type: Report
System: The UNT Digital Library
Simulations of spectral broadening by cross-phase modulation (XPM) with chaotic light pulses (open access)

Simulations of spectral broadening by cross-phase modulation (XPM) with chaotic light pulses

Spectral broadening of single-frequency laser pulses by optical cross-phase modulation (XPM) with chaotic laser pulses in birefringent single-mode optical fibers is investigated numerically and results are compared with experiments. By this process we have generated laser pulses of variable bandwidth (1--25 {Angstrom}) at the fundamental wavelength (1053 nm) for amplification in high power solid-state Nd:glass lasers used for inertial confinement fusion research. Simulations indicate that a temporally smooth XPM pulse can be generated with intensity fluctuations of less than 10% and spectral width greater than 50 {Angstrom} using a short length ({approximately}5 m) of special low dispersion and low birefringence fiber, e.g. D = 10 ps/nm-km (normal dispersion) and {Delta}n = 2 {times} 10{sup {minus}5}. Readily available fibers of similar length, with parameters of D = 40 ps/nm-km and {Delta}n = 6 {times} 10{sup {minus}5}, can give spectral widths exceeding 25 {Angstrom}, but the noise will range from 25 to 60%. Broadband laser pulses generated by XPM are now routinely used at Lawrence Livermore National Laboratory for active smoothing of the laser irradiance on targets by the technique of smoothing-by-spectral dispersion.
Date: May 25, 1993
Creator: Henesian, M. A.; Dixit, S. N.; Chen, C. J.; Wai, P. K. A. & Menyuk, C. R.
Object Type: Article
System: The UNT Digital Library
IGR NO[sub x]/SO[sub x] control technology (open access)

IGR NO[sub x]/SO[sub x] control technology

The technical work during this reporting term has principally involved the continued development, optimization and improvement of freezing drying techniques for solid ceramic oxide electrolyte powder preparation, preliminary optimization of the calcining of the ceramic electrolyte freeze dried powders to allow for optimum processing to the IGR composite, and determining (initial) electrochemical properties of the stabilized ceramic solid electrolyte at a variety of temperatures in air.
Date: April 25, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
IGR NO{sub x}/SO{sub x} control technology. Second technical progress report, January 1--March 31, 1993 (open access)

IGR NO{sub x}/SO{sub x} control technology. Second technical progress report, January 1--March 31, 1993

The technical work during this reporting term has principally involved the continued development, optimization and improvement of freezing drying techniques for solid ceramic oxide electrolyte powder preparation, preliminary optimization of the calcining of the ceramic electrolyte freeze dried powders to allow for optimum processing to the IGR composite, and determining (initial) electrochemical properties of the stabilized ceramic solid electrolyte at a variety of temperatures in air.
Date: April 25, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Aerogels for microelectronic applications: Fast, inexpensive, and light as air (open access)

Aerogels for microelectronic applications: Fast, inexpensive, and light as air

Silica aerogel consists of bonded silicon and oxygen joined into log strands, which are randomly linked together with pockets of air between them. Discovered in the 1930s, the material was thought to have little use outside of theoretical science. However, with the advent of greatly improved processing techniques, such as those developed at Lawrence Livermore National Laboratory, aerogels are on the verge of commercialization. This document describes the need for aerogels in the high-speed microelectronics industry, and state of the art processing techniques. Collaboration is welcomed in the endeavor.
Date: March 25, 1993
Creator: Contolini, R. J.; Hrubesh, L. W. & Bernhardt, A. F.
Object Type: Article
System: The UNT Digital Library
Annual report to Congress 1992 (open access)

Annual report to Congress 1992

By Congress in 1977 as an independent entity within the Department of Energy, the Energy Information Administration (EIA) is the principal and authoritative source of comprehensive energy data for the Congress, the Federal Government, the States, and the public. During 1992, EIA provided information and analysis in response to many energy-related issues and events, including Hurricane Andrew. In addition, EIA made substantial strides in a number of critical special projects, most notably development of the National Energy Modeling System, preparation of National Petroleum Council studies on petroleum refining and natural gas, and establishment of oxygenate data program mandated by the Clean Air Act Amendments of 1990. EIA also took advantage of new opportunities for international consultations and energy information exchanges. This report to Congress contains energy-related information on the following: petroleum; natural gas; integrated analysis and forecasting; electricity; coal; energy markets and end use, nuclear, statistical standards, and information services. The appendices include: data collection surveys of the Energy Information Administration; Analytic models of the Energy Information Administration; EIA publication -- EIA products available on diskette; and Major laws affecting EIA, 1974-1992.
Date: March 25, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Battery testing at Argonne National Laboratory (open access)

Battery testing at Argonne National Laboratory

Argonne National Laboratory`s Analysis & Diagnostic Laboratory (ADL) tests advanced batteries under simulated electric and hybrid vehicle operating conditions. The ADL facilities also include a post-test analysis laboratory to determine, in a protected atmosphere if needed, component compositional changes and failure mechanisms. The ADL provides a common basis for battery performance characterization and life evaluations with unbiased application of tests and analyses. The battery evaluations and post-test examinations help identify factors that limit system performance and life, and the most-promising R&D approaches for overcoming these limitations. Since 1991, performance characterizations and/or life evaluations have been conducted on eight battery technologies (Na/S, Li/S, Zn/Br, Ni/MH, Ni/Zn, Ni/Cd, Ni/Fe, and lead-acid). These evaluations were performed for the Department of Energy`s. Office of Transportation Technologies, Electric and Hybrid Propulsion Division (DOE/OTT/EHP), and Electric Power Research Institute (EPRI) Transportation Program. The results obtained are discussed.
Date: March 25, 1993
Creator: DeLuca, W. H.; Gillie, K. R.; Kulaga, J. E.; Smaga, J. A.; Tummillo, A. F. & Webster, C. E.
Object Type: Article
System: The UNT Digital Library
Battery testing at Argonne National Laboratory (open access)

Battery testing at Argonne National Laboratory

Argonne National Laboratory's Analysis Diagnostic Laboratory (ADL) tests advanced batteries under simulated electric and hybrid vehicle operating conditions. The ADL facilities also include a post-test analysis laboratory to determine, in a protected atmosphere if needed, component compositional changes and failure mechanisms. The ADL provides a common basis for battery performance characterization and life evaluations with unbiased application of tests and analyses. The battery evaluations and post-test examinations help identify factors that limit system performance and life, and the most-promising R D approaches for overcoming these limitations. Since 1991, performance characterizations and/or life evaluations have been conducted on eight battery technologies (Na/S, Li/S, Zn/Br, Ni/MH, Ni/Zn, Ni/Cd, Ni/Fe, and lead-acid). These evaluations were performed for the Department of Energy's. Office of Transportation Technologies, Electric and Hybrid Propulsion Division (DOE/OTT/EHP), and Electric Power Research Institute (EPRI) Transportation Program. The results obtained are discussed.
Date: March 25, 1993
Creator: DeLuca, W. H.; Gillie, K. R.; Kulaga, J. E.; Smaga, J. A.; Tummillo, A. F. & Webster, C. E.
Object Type: Article
System: The UNT Digital Library
Development of a membrane-based process for the treatment of oily waste waters. [Quarterly] report, December 5, 1992--March 4, 1993 (open access)

Development of a membrane-based process for the treatment of oily waste waters. [Quarterly] report, December 5, 1992--March 4, 1993

This is the fourth quarterly report covering December 5, 1992, to March 4, 1993. The overall goal of this program is to develop a system based on reverse osmosis (RO) membranes that can treat oily water economically. This system will be based on the use of thin-film-composite (TFC) membranes that consist of a selective coating placed on a solvent-resistant hollow-fiber support. For this program, we plan to develop solvent-resistant hollow-fiber supports and coat them with a ``loose RO`` coating. We developed the coating, which is designated TTM, in previous work for the treatment of oily waste waters. During this reporting period, work was focused on (1)fabrication and testing of large-scale hollow-fiber modules, (2)performing preliminary field tests using these modules, and (3)arranging for a demonstration test of this technology. Our results show that the solvent-resistant TTM hollow-fiber modules perform well when operated on oily waters. During the next reporting period, we plan to complete arrangements for the demonstration test of this technology. This field test, preparation of the final report, and technology transfer are the only tasks remaining in this program.
Date: March 25, 1993
Creator: McCray, S. B.
Object Type: Report
System: The UNT Digital Library
Effect of pretreating of host oil on coprocessing (open access)

Effect of pretreating of host oil on coprocessing

The principal objective of this research is to determine the role host petroleum-derived oils (1000[degrees]F+), as well as that of catalytically treated host oils, play when used as liquefaction solvents in coprocessing with coal. The host oils will be extensively characterized and then pretreated in a number of ways which involve catalytic reactions such as hydrogenation, hydrocracking, isomerization, and dehydrogenation. The pretreated oils win then be characterized. The effects of the host oil on coprocessing with coal win be compared to those obtained using catalytically modified heavy oils. When appropriate, model compounds will be used to study specific reactions brought about by the pretreatments. Highly dispersed iron catalysts modified by the addition of small amounts of other metals wig be used to modify the chemical composition of the host oils. Work continued on Task H during this quarter. In the first phase of this task, the test oil, an Amoco resid, is being treated with hydrogenation catalysts such as Mo(CO)[sub 6] and Fe[sub 2]O[sub 3]/SO[sub 4] to determine the conditions necessary to increase the hydrogen content from about 10.2 wt % to about 11.5 wt %. In the second phase, more severe hydrogenation/hydrorefining is being carried out to determine the …
Date: March 25, 1993
Creator: Wender, I. & Tierney, J.W.
Object Type: Report
System: The UNT Digital Library
Effect of pretreating of host oil on coprocessing. Quarterly progress report, October 1, 1992--December 31, 1992 (open access)

Effect of pretreating of host oil on coprocessing. Quarterly progress report, October 1, 1992--December 31, 1992

The principal objective of this research is to determine the role host petroleum-derived oils (1000{degrees}F+), as well as that of catalytically treated host oils, play when used as liquefaction solvents in coprocessing with coal. The host oils will be extensively characterized and then pretreated in a number of ways which involve catalytic reactions such as hydrogenation, hydrocracking, isomerization, and dehydrogenation. The pretreated oils win then be characterized. The effects of the host oil on coprocessing with coal win be compared to those obtained using catalytically modified heavy oils. When appropriate, model compounds will be used to study specific reactions brought about by the pretreatments. Highly dispersed iron catalysts modified by the addition of small amounts of other metals wig be used to modify the chemical composition of the host oils. Work continued on Task H during this quarter. In the first phase of this task, the test oil, an Amoco resid, is being treated with hydrogenation catalysts such as Mo(CO){sub 6} and Fe{sub 2}O{sub 3}/SO{sub 4} to determine the conditions necessary to increase the hydrogen content from about 10.2 wt % to about 11.5 wt %. In the second phase, more severe hydrogenation/hydrorefining is being carried out to determine the …
Date: March 25, 1993
Creator: Wender, I. & Tierney, J. W.
Object Type: Report
System: The UNT Digital Library
Hypersingular integrals at a corner (open access)

Hypersingular integrals at a corner

For a smooth boundary, hypersingular integrals can be defined as a limit from the interior, the approach direction being taken, for convenience, normal to the surface. At a boundary corner, the limit process, with a necessarily non-normal approach direction, provides a valid definition of the hypersingular equation, as long as the direction is employed for all integrations. The terms which are potentially singular in the limit are shown to cancel, provided the function approximations at the corner are consistent. The analytical formulas for the singular integrals are more complicated than for a smooth surface, but are easily obtained using symbolic computation. These techniques have been employed to accurately solve the ``L-shaped domain`` potential problem considered by Jaswon and Symm.
Date: March 25, 1993
Creator: Gray, L. J. & Manne, L. L.
Object Type: Article
System: The UNT Digital Library
Integrated circuits: Resistless processing simplifies production and cuts costs (open access)

Integrated circuits: Resistless processing simplifies production and cuts costs

Reducing the complexity and cost of producing deep-submicrometer integrated circuits (ICs) will soon be possible using a revolutionary approach being developed at the Lawrence Livermore National Laboratory (LLNL). Resistless Projection Doping (RPD) will eliminate the need for photoresist processing during the impurity doping step. This single innovation will reduce the doping sequence from 13 steps to 1 and eliminate the need for five pieces of capital equipment costing more than $5 million. The overall cost of high-volume wafer fabrication will be reduced by more than 10 percent. In addition, the LLNL RPD machine is compact and modular, minimizing facilities costs when compared to today`s industry-standard doping equipment. These physical characteristics of the machine also allow the RPD process to be easily incorporated into single-wafer, ``cluster`` processing tools. When integrated with existing deposition, etching, and annealing steps and developing lithography techniques, the LLNL doping process completes the technology set required to produce a flexible fabrication facility of the future. At one-fifth the cost of current mega-fabrication facilities, the availability of these compact, low-volume, smart factories will give US manufacturers a substantial competitive advantage in the world-wide marketplace for high-value custom and semi-custom integrated circuits.
Date: March 25, 1993
Creator: Weiner, K.
Object Type: Article
System: The UNT Digital Library
State policies affecting natural gas consumption (Notice of inquiry issued on August 14, 1992) (open access)

State policies affecting natural gas consumption (Notice of inquiry issued on August 14, 1992)

On August 14, 1992, the United States Department of Energy issued a Request for Comments Concerning State Policies Affecting Natural Gas Consumption. This Notice of (NOI) noted the increasing significance of the role played by states and sought to gain better understanding of how state policies impact the gas industry. The general trend toward a. more competitive marketplace for natural gas, as well as recent regulatory and legislative changes at the Federal level, are driving State regulatory agencies to reevaluate how they regulate natural gas. State action is having a significant impact on the use of natural gas for generating electricity, as well as affecting the cost-effective trade-off between conservation expenditures and gas use. Additionally, fuel choice has an impact upon the environment and national energy security. In light of these dimensions, the Department of Energy initiated this study of State regulation. The goals of this NOI are: (1) help DOE better understand the impact of State policies on the efficient use of gas; (2) increase the awareness of the natural gas industry and Federal and State officials to the important role of State policies and regulations; (3) create an improved forum for dialogue on State and Federal natural gas …
Date: March 25, 1993
Creator: Lemon, R. & Kamphuis-Zatopa, W.
Object Type: Article
System: The UNT Digital Library
State policies affecting natural gas consumption (Notice of inquiry issued on August 14, 1992). Summary of comments (open access)

State policies affecting natural gas consumption (Notice of inquiry issued on August 14, 1992). Summary of comments

On August 14, 1992, the United States Department of Energy issued a Request for Comments Concerning State Policies Affecting Natural Gas Consumption. This Notice of (NOI) noted the increasing significance of the role played by states and sought to gain better understanding of how state policies impact the gas industry. The general trend toward a. more competitive marketplace for natural gas, as well as recent regulatory and legislative changes at the Federal level, are driving State regulatory agencies to reevaluate how they regulate natural gas. State action is having a significant impact on the use of natural gas for generating electricity, as well as affecting the cost-effective trade-off between conservation expenditures and gas use. Additionally, fuel choice has an impact upon the environment and national energy security. In light of these dimensions, the Department of Energy initiated this study of State regulation. The goals of this NOI are: (1) help DOE better understand the impact of State policies on the efficient use of gas; (2) increase the awareness of the natural gas industry and Federal and State officials to the important role of State policies and regulations; (3) create an improved forum for dialogue on State and Federal natural gas …
Date: March 25, 1993
Creator: Lemon, R. & Kamphuis-Zatopa, W.
Object Type: Article
System: The UNT Digital Library