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Modern Topographic Mapping of Texas - An Historical Sketch
Report on the project to topographically map all of Texas, and the 82% coverage currently offered at the time of writing.
Date:
May 1980
Creator:
Baskin, C. R.
System:
The Portal to Texas History
Occurrence, Quality, and Availability of Ground Water in Callahan County, Texas
Report on the groundwater in Callahan County, including chemical quality analyses, water usage, recharge rates, and storage estimates.
Date:
August 1983
Creator:
Price, Robert D.; Walker, Loyd E. & Sieh, Thomas W.
System:
The Portal to Texas History