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Geology and ground-water resources of Comal County, Texas
1 online resource (vi, 126 pages) : illustrations, maps.
by William O. George ; with sections on Surface-water runoff, by Seth D. Breeding and Chemical character of the water, by Warren W. Hastings.
"Prepared in cooperation with the Texas Board of Water Engineers."
Includes National Geologic Map Database index page and 3 plates on HTML page.
Includes bibliographical references and index.
Geological Survey water-supply paper ; 1138