%0 Map %0 U.S. Federal Government Document %0 Print %A Hansen, Wallace R., 1920- %E Rowley, Peter D. %E Geological Survey (U.S.) %I U.S. Geological Survey %D 1980 %C Reston, Va. %G English %B Geologic quadrangle map %T Geologic map of the Hells Canyon quadrangle, Moffat County, Colorado