01852oam 2200517 450 991071520650332120210204110014.0(CKB)5470000002509964(OCoLC)679039803(OCoLC)622329126(OCoLC)667913631(OCoLC)966434775(OCoLC)1153329879(OCoLC)995470000002509964(EXLCZ)99547000000250996420101106d1989 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierExternal quality-assurance results for the National Atmospheric Deposition Program and the National Trends Network during 1987 /by Randolph B. See, LeRoy J. Schroder, and Timothy C. WilloughbyDenver, Colorado :U.S. Geological Survey,1989.1 online resource (iv, 16 pages) illustrationsWater-resources investigations report ;89-4015Includes bibliographical references (pages 15-16).Quality assuranceAcid depositionUnited StatesTestingAcid depositionTestingfastUnited StatesfastQuality assurance.Acid depositionTesting.Acid depositionTesting.See Randolph B.1387376Schroder L. J.Willoughby Timothy C.Geological Survey (U.S.),OCLCEOCLCEOCLCQOCLCFOCLCQOCLCOOCLCQCOPGPOBOOK9910715206503321External quality-assurance results for the National Atmospheric Deposition Program and the National Trends Network during 19873480935UNINA