01659oam 2200505 450 991071182980332120190212080606.0(CKB)5470000002487786(OCoLC)953694594(OCoLC)995470000002487786(EXLCZ)99547000000248778620160718d1968 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierUtilization of humus-rich forest soil (mull) in geochemical exploration for gold /by Gary C. Curtin [and three others]Washington :United States Department of the Interior, Geological Survey,1968.1 online resource (iii, 11 pages) illustrations, mapsGeological Survey circular ;562Includes bibliographical references (page 4).Utilization of humus-rich forest soil Geochemical prospectingHumusGold oresColoradoClear Creek CountyGeochemical prospectingfastGold oresfastGeochemical prospecting.Humus.Gold oresGeochemical prospecting.Gold ores.Curtin Gary C.1935-1399636Geological Survey (U.S.),COPCOPOCLCOOCLCAOCLCFGPOBOOK9910711829803321Utilization of humus-rich forest soil (mull) in geochemical exploration for gold3516988UNINA