01592oam 2200433 450 991071609350332120210922134933.0(CKB)5470000002517166(OCoLC)680109750(OCoLC)622336345(OCoLC)667901409(OCoLC)974647774(OCoLC)995470000002517166(EXLCZ)99547000000251716620101107d1995 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierExternal quality-assurance results for the National Atmospheric Deposition Program/National Trends Network during 1991 /by Mark A. Nilles [and three others]Denver, Colorado :U.S. Geological Survey,1995.1 online resource (v, 36 pages) illustrations, mapsWater-resources investigations report ;93-4208Includes bibliographical references (pages 35-36).Acid depositionEnvironmental aspectsUnited StatesMeasurementQuality controlUnited StatesfastAcid depositionEnvironmental aspectsMeasurementQuality control.Nilles Mark A.1384195Geological Survey (U.S.),OCLCEOCLCEOCLCQOCLCOOCLCQCOPOCLCFGPOBOOK9910716093503321External quality-assurance results for the National Atmospheric Deposition Program3471976UNINA