01621oam 2200469 450 991071158750332120181025111324.0(CKB)5470000002484173(OCoLC)953291107(OCoLC)995470000002484173(EXLCZ)99547000000248417320160708d1975 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierWater quality of hydrologic bench marks an indicator of water quality in the natural environment /by James E. Biesecker and Donald K. Leifeste[Washington, D.C.] :United States Department of the Interior, Geological Survey,1975.1 online resource (iv, 21 pages) illustrations, mapsGeological Survey circular ;460-EConservation networksIncludes bibliographical references (pages 20-21).Water quality of hydrologic bench marks Water qualityUnited StatesMeasurementEvaluationWater qualityfastUnited StatesfastWater qualityMeasurementEvaluation.Water quality.Biesecker James E.1941-1386537Leifeste Donald K.1932-Geological Survey (U.S.),COPCOPOCLCOOCLCFOCLCAGPOBOOK9910711587503321Water quality of hydrologic bench marks3537828UNINA