01707nam 2200409 a 450 991070080330332120110912151548.0(CKB)5470000002412989(OCoLC)751991499(EXLCZ)99547000000241298920110912d2011 ua 0engurcn|||||||||txtrdacontentcrdamediacrrdacarrierFactors affecting groundwater quality in the Valley and Ridge aquifers, eastern United States, 1993-2002[electronic resource] /by Gregory C. Johnson ... [and others] ; National Water-Quality Assessment ProgramReston, Va. :U.S. Dept. of the Interior, U.S. Geological Survey,2011.1 online resource (x, 70 pages) illustrations (chiefly color), color mapsScientific investigations report ;2011-5115Title from title screen (viewed on Sept. 12, 2011).Includes bibliographical references (pages 58-64).GroundwaterQualityEast (U.S.)GroundwaterEnvironmental aspectsEast (U.S.)AquifersEnvironmental aspectsEast (U.S.)GroundwaterQualityGroundwaterEnvironmental aspectsAquifersEnvironmental aspectsJohnson Gregory C1354062Geological Survey (U.S.)National Water-Quality Assessment Program (U.S.)GPOGPOBOOK9910700803303321Factors affecting groundwater quality in the Valley and Ridge aquifers, eastern United States, 1993-20023532475UNINA