01493oam 2200469 450 991070865590332120170523101947.0(CKB)5470000002470667(OCoLC)891401403(OCoLC)995470000002470667(EXLCZ)99547000000247066720140926d1917 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierThe coal fields of the United StatesGeneral introduction /by Marius R. CampbellWashington :Department of the Interior, United States Geological Survey,1917.1 online resource (33 pages) illustrations +1 plateProfessional paper ;100-ATitle from title screen (viewed September 17, 2014)."Published February 24, 1917.""Professional Paper 100, pages 1-33."Includes bibliographical references.CoalUnited StatesCoalfastUnited StatesfastCoalCoal.Campbell Marius R(Marius Robinson),1858-1940,810150Geological Survey (U.S.),COPCOPOCLCOOCLCAOCLCFGPOBOOK9910708655903321The coal fields of the United States3490857UNINA