Geologic Map of the Concan Quadrangle, Texas, by E. W. Collins. Oversize geologic map on color topographic base, map scale 1:24,000, with explanatory text, 2001. Print Version.
OFM0126. Geologic Map of the Concan Quadrangle, Texas, by E. W. Collins. Oversize geologic map on color topographic base, map scale 1:24,000, with explanatory text, 2001.