01691oam 2200505Ia 450 991069293200332120050215113707.0(CKB)5470000002358177(OCoLC)38213971ocm38213971(OCoLC)995470000002358177(EXLCZ)99547000000235817719980116d1997 ua 0engurcn||||||txtrdacontentcrdamediacrrdacarrierNitrate in the ground waters of the United States[electronic resource] assessing the risk /by Bernard T. Nolan and Barbara C. Ruddy[Reston, Va.] :U.S. Geological Survey,[1997?]U.S. Geological Survey fact sheet ;FS-92-96At head of title: National Water-Quality Assessment Program.Includes bibliographical references.Nitrate in the ground waters of the United States WaterNitrogen contentUnited StatesGroundwaterPollutionUnited StatesWater qualityUnited StatesWaterNitrogen contentGroundwaterPollutionWater qualityNolan Bernard T.1954-1383937Ruddy Barbara C1383938National Water-Quality Assessment Program (U.S.)Geological Survey (U.S.)GPOGPOAGLOCLAGLOCLCQGPOBOOK9910692932003321Nitrate in the ground waters of the United States3429541UNINA