Geologic Map of the Smithson Valley Quadrangle, Texas, by E. W. Collins. Oversize geologic map on color topographic base, map scale 1:24,000 with explanatory text, 1992. Print Version.
OFM0106. Geologic Map of the Smithson Valley Quadrangle, Texas, by E. W. Collins. Oversize geologic map on color topographic base, map scale 1:24,000 with explanatory text, 1992.