02210oam 2200625 450 991070402040332120151104091554.0(CKB)5470000002437454(OCoLC)886559795(EXLCZ)99547000000243745420140812d1986 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierCoal geology and coal, oil, and gas resources of the Erie and Frederick Quadrangles, Boulder and Weld Counties, Colorado /by Frank D. Spencer[Reston, Va.] :Department of the Interior, U.S. Geological Survey,1986.[Washington, D.C.] :United States Government Printing Office.1 online resource (xviii, 458 pages, 7 pages of plates) illustrations (some color), color mapsU.S. Geological Survey bulletin ;1619Title from title screen (viewed Aug. 11, 2014).U.S. G.P.O. sales statement incorrect in publication.Includes bibliographical references.CoalColoradoBoulder CountyCoalColoradoWeld CountyPetroleumColoradoBoulder CountyPetroleumColoradoWeld CountyNatural gasColoradoBoulder CountyNatural gasColoradoWeld CountyCoalfastNatural gasfastPetroleumfastColoradoBoulder CountyfastColoradoWeld CountyfastCoalCoalPetroleumPetroleumNatural gasNatural gasCoal.Natural gas.Petroleum.Spencer Frank Darwyn1904-1403779Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910704020403321Coal geology and coal, oil, and gas resources of the Erie and Frederick Quadrangles, Boulder and Weld Counties, Colorado3519510UNINA