01654oam 2200481 450 991071205980332120190402084808.0(CKB)5470000002489503(OCoLC)1041735531(OCoLC)995470000002489503(EXLCZ)99547000000248950320180622d1993 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierUnderstanding our fragile environment lessons from geochemical studies /compiled by Larry P. Gough[Reston, Virginia] :U.S. Department of the Interior, U.S. Geological Survey,1993.[Washington, D.C.] :United States Government Printing Office,1993.1 online resource (v, 34 pages) illustrations, mapsU.S. Geological Survey circular ;1105Public Issues in Earth ScienceTitle from title screen (viewed June 22, 2018).Includes bibliographical references (page 31).Understanding our fragile environment Environmental geochemistryEarth sciencesEnvironmental geochemistryfastEnvironmental geochemistry.Earth sciences.Environmental geochemistry.Gough L. P.Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910712059803321Understanding our fragile environment3521030UNINA