01539oam 2200457 450 991070800020332120170112105633.0(CKB)5470000002468562(OCoLC)937436790(OCoLC)885121859(EXLCZ)99547000000246856220160208d1965 ua 0engurmn|||||||||txtrdacontentcrirdacontentcrdamediacrrdacarrierThe Black Canyon of the Gunnison today and yesterday /by Wallace R. Hansen[Washington, D.C.] :United States Department of the Interior, Geological Survey,1965.Washington :United States Government Printing Office.1 online resource (vii, 76 pages) illustrations, mapsGeological Survey bulletin ;1191Includes bibliographical references (pages 75-76).Black Canyon of the Gunnison GeologyColoradoBlack Canyon of the GunnisonGeologyfastBlack Canyon of the Gunnison (Colo.)ColoradoBlack Canyon of the GunnisonfastGeologyGeology.Hansen Wallace R.1920-1393733Geological Survey (U.S.)OCLCEOCLCECOPOCLCQGPOBOOK9910708000203321The Black Canyon of the Gunnison3529158UNINA