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Geologic Map of the Murphy School Quadrangle, Texas, by E. W. Collins. Oversize geologic map on color topographic base, map scale 1:24,000, with explanatory text, 1998. Downloadable PDF.
Keywords: maps, geologic maps, Murphy School Quadrangle, Medina County, Texas
Collins, E. W., 1998, Geologic Map of the Murphy School Quadrangle, Texas: The University of Texas at Austin, Bureau of Economic Geology, Open-File Map No. 88, map scale 1:24,000.