01521oam 2200433 a 450 991069167620332120230901215138.0(CKB)5470000002346619(OCoLC)49324732ocm49324732(OCoLC)995470000002346619(EXLCZ)99547000000234661920020315d1999 ua 0engurmn|mmmmuuuutxtrdacontentcrdamediacrrdacarrierExternal quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1995-96 /John D. GordonDenver, Colo. :U.S. Dept. of the Interior, U.S. Geological Survey :U.S. Geological Survey, Information Services [distributor],1999.1 online resourceWater-resources investigations report ;99-4072Includes bibliographical references.Acid depositionUnited StatesTestingAtmospheric depositionUnited StatesQuality assuranceAcid depositionTesting.Atmospheric depositionQuality assurance.Gordon J. D1383710Geological Survey (U.S.)EYMEYMOCLCQGPOBOOK9910691676203321External quality-assurance results for the National Atmospheric Deposition Program3428903UNINA