02515oam 2200649 450 991071662070332120210914131412.0(CKB)5470000002523962(OCoLC)681441246(OCoLC)621847892(OCoLC)667886830(OCoLC)984765473(OCoLC)995470000002523962(EXLCZ)99547000000252396220101115d1997 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierRelation of nitrogen and phosphorus in ground water to land use in four subunits of the Potomac River Basin /by Scott W. Ator and Janet M. Denis ; prepared as part of the National Water-Quality Assessment (NAWQA) ProgramBaltimore, Maryland :U.S. Geological Survey,1997.1 online resource (vi, 26 pages) color illustrations, maps (some color)Water-resources investigations report ;96-4268Includes bibliographical references (pages 24-26).GroundwaterPollutionPotomac River WatershedNitratesEnvironmental aspectsPotomac River WatershedWaterNitrogen contentPotomac River WatershedWaterPhosphorus contentPotomac River WatershedNutrient pollution of waterPotomac River WatershedGroundwaterPollutionfastNitratesEnvironmental aspectsfastNutrient pollution of waterfastUnited StatesPotomac River RegionfastGroundwaterPollutionNitratesEnvironmental aspectsWaterNitrogen contentWaterPhosphorus contentNutrient pollution of waterGroundwaterPollution.NitratesEnvironmental aspects.Nutrient pollution of water.Ator Scott W.1386575Denis Janet M.Geological Survey (U.S.),National Water-Quality Assessment Program (U.S.)OCLCEOCLCEOCLCQOCLCFOCLCQOCLCOOCLCQCOPOCLCAGPOBOOK9910716620703321Relation of nitrogen and phosphorus in ground water to land use in four subunits of the Potomac River Basin3523014UNINA