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Geology and Ground Water Resources of the Big Spring Area, Texas
註釋Plate 6 is a geological map of Howard and Glassock counties, Texas, showing location of wells and springs, structure contours on the top of the trinity sand, and the thickenss of the permian salt. Plate 13 is a map of parts of Howard and Glassock counties, Texas, showing locations of wells and springs, and latitude of the water table in January of 1938.