01694oam 2200493 450 991071186560332120190201110651.0(CKB)5470000002487424(OCoLC)979996456(OCoLC)953695359(OCoLC)995470000002487424(EXLCZ)99547000000248742420170328d1974 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierMineral resources: potentials and problems /by Walden P. Pratt and Donald A. Brobst[Reston, Virginia] :United States Department of the Interior, Geological Survey,1974.1 online resource (iii, 20 pages)Geological Survey circular ;698"A summary of United States resources of 27 major mineral commodities, and the problems involved in their utilization."Includes bibliographical references (pages 19-20).Mineral resourcesMines and mineral resourcesUnited StatesMines and mineral resourcesfastUnited StatesfastMines and mineral resourcesMines and mineral resources.Pratt Walden P.1397053Brobst Donald A(Donald Albert),1925-2011,Geological Survey (U.S.),OCLCEOCLCECOPOCLCFOCLCAOCLCQOCLCAGPOBOOK9910711865603321Mineral resources: potentials and problems3535186UNINA