01779oam 2200493 450 991070736260332120160718084009.0(CKB)5470000002463891(OCoLC)885120977(EXLCZ)99547000000246389120140802d1960 ua 0engurn||||||||||crirdacontenttxtrdacontentcrdamediacrrdacarrierGeology and fluorspar deposits, Northgate district, Colorado /by Thomas A. StevenWashington, D.C. :United States Department of the Interior, Geological Survey,1960.Washington, D.C. :Government Printing Office.1 online resource (v, 323-422 pages, 4 pages of plates) illustrations, mapsContributions to economic geologyGeological Survey bulletin ;1082-F"Prepared in cooperation with the Colorado State Geological Survey Board and the Colorado Metal Mining Fund Board."Title from title screen (viewed July 23, 2014).Includes bibliographical references (pages 417-420) and index.FluorsparColoradoGeologyColoradoFluorsparGeologySteven Thomas A(Thomas August),1917-2013,1388925Colorado Geological Survey,Colorado State Metal Mining Fund,Geological Survey (U.S.),COPCOPOCLCOTRAALOCLCAGPOBOOK9910707362603321Geology and fluorspar deposits, Northgate district, Colorado3483167UNINA