01858oam 2200505 450 991070737210332120160713145610.0(CKB)5470000002463795(OCoLC)889600880(EXLCZ)99547000000246379520140829d1991 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierMineral resource potential of the NB-20-4 Quadrangle, Eastern Guayana Shield, Bolívar State, Venezuela /by Jeffrey C. Wynn and Gary B. Sidder[Reston, Va.] :U.S. Department of the Interior, U.S. Geological Survey,1991.[Washington, D.C.] :United States Government Printing Office.1 online resource (iii, 16 pages) illustrations, mapsU.S. Geological Survey Bulletin ;1960Title from title screen (viewed Aug. 20, 2014).Includes bibliographical references.Guayana Shield, Bolívar State, VenezuelaGeologyVenezuelaBolívar (State)Mines and mineral resourcesVenezuelaBolívar (State)GeologyfastMines and mineral resourcesfastVenezuelaBolívar (State)fastGeologyMines and mineral resourcesGeology.Mines and mineral resources.Wynn Jeffrey C.1380888Sidder Gary B.Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910707372103321Mineral resource potential of the NB-20-4 Quadrangle, Eastern Guayana Shield, Bolívar State, Venezuela3458808UNINA