Spawning Areas and Abundance of Chinook Salmon (Oncorhynchus tshawytscha) in the Columbia River Basin: Past and Present (open access)

Spawning Areas and Abundance of Chinook Salmon (Oncorhynchus tshawytscha) in the Columbia River Basin: Past and Present

From abstract: Important Chinook salmon spawning areas are listed and charted in this report according to their past use and present use.
Date: October 1968
Creator: Fulton, Leonard A.
System: The UNT Digital Library
Technology of Liquid Helium (open access)

Technology of Liquid Helium

From Abstract: "This treatise is a source document containing information on helium resources, production, conservation, thermodynamic properties, liquefaction and refrigeration techniques, transportation and storage of liquid and safety requirements. It also contains a discussion of uses for liquid and cold gas in cryoelectronics, superconductivity, bubble chambers, cryopumping and missile and space systems."
Date: October 1968
Creator: Kropschot, R. H.; Birmingham, B. W. & Mann, D. B.
System: The UNT Digital Library