RECONNAISSANCE GEOLOGIC MAP OF PARTS OF THE TWIN PEAKS AND BLANCA PEAK QUADRANGLES, ALAMOSA, COSTILLA, AND HUERFANO COUNTIES, COLORADO; MISCELLANEOUS FIELD STUDIES MAP MF-2169, 1991
Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1991. Map. Large folded map sheet. Fine as new map in fine paper sleeve. More