01643oam 2200457 450 991071657560332120210611170515.0(CKB)5470000002522397(OCoLC)681414991(OCoLC)621847812(OCoLC)667932297(OCoLC)984765491(OCoLC)1102773622(OCoLC)995470000002522397(EXLCZ)99547000000252239720101115d1997 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierExternal quality-assurance results for the National Atmospheric Deposition Program/National Trends Network during 1994 /by John D. Gordon [and three others]Denver, Colorado :U.S. Geological Survey,1997.1 online resource (v, 42 pages) illustrations, mapWater-resources investigations report ;97-4201Includes bibliographical references (pages 41-42).Acid depositionUnited StatesTestingQuality controlAcid depositionTestingfastUnited StatesfastAcid depositionTestingQuality control.Acid depositionTesting.Gordon J. D.1383710Geological Survey (U.S.),OCLCEOCLCEOCLCQOCLCFOCLCOOCLCQCOPGPOBOOK9910716575603321External quality-assurance results for the National Atmospheric Deposition Program3428903UNINA