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Test drilling for ground water in Hudspeth, Culberson, and Presidio Counties in westernmost Texas
Joseph Spencer Gates, Donald Edward White
1976, Open-File Report 76-338
From November 1973 to October 1974, the U.S. Geological Survey drilled four deep test holes to supplement hydrologic and geophysical studies evaluating fresh ground water in the basins of westernmost Texas. For each test, samples of drill cuttings were collect·ed, borehole geophysical logs were run, and water samples were collected...
Interpretation of Landsat imagery of the Tanacross quadrangle, Alaska
Nairn R. Albert, William Clinton Steele
1976, Open-File Report 76-850
In this study of Landsat imagery for the Tanacross quadrangle, Alaska, two fundamentally different types of images were used: (1) a black and white, single band, Landsat mosaic of Alaska, constructed with images that are not computer-enhanced; and (2) various types of computer-enhanced Landsat images....