Geologic Map of the Del Rio SE Quadrangle, Texas, by E. W. Collins. Oversize geologic map on color topographic base, map scale 1:24,000, with explanatory text, 1998. Print Version.
OFM0071. Geologic Map of the Del Rio SE Quadrangle, Texas, by E. W. Collins. Oversize geologic map on color topographic base, map scale 1:24,000, with explanatory text, 1998.