Washington, D. C. United States Government Printing Office, 1968. Slipcase torn along front spine top & botton, 9" x 6" 3 foldout maps, 119 pages, indexed. from the title page, "A study of the areal geology of parts of the North and Middle Park basins, Jackson and Grand Counties, Colorado."..... More

U.S. Geological Survey, 1976. tan envelope, 1 foldout. map scale 1:250,000 DM4. More