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100   $a20160708d1975      ua             0
101 0 $aeng
135   $aurbn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aWater quality of hydrologic bench marks $ean indicator of water quality in the natural environment /$fby James E. Biesecker and Donald K. Leifeste
210  1$a[Washington, D.C.] :$cUnited States Department of the Interior, Geological Survey,$d1975.
215   $a1 online resource (iv, 21 pages) $cillustrations, maps
225 1 $aGeological Survey circular ;$v460-E
225 1 $aConservation networks
320   $aIncludes bibliographical references (pages 20-21).
517   $aWater quality of hydrologic bench marks 
606   $aWater quality$zUnited States$xMeasurement$xEvaluation
606   $aWater quality$2fast
607   $aUnited States$2fast
615  0$aWater quality$xMeasurement$xEvaluation.
615  7$aWater quality.
700   $aBiesecker$b James E.$f1941-$01386537
702   $aLeifeste$b Donald K.$f1932-
712 02$aGeological Survey (U.S.),
801  0$bCOP
801  1$bCOP
801  2$bOCLCO
801  2$bOCLCF
801  2$bOCLCA
801  2$bGPO
906   $aBOOK
912   $a9910711587503321
996   $aWater quality of hydrologic bench marks$93537828
997   $aUNINA