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035   $a(OCoLC)56362019
035   $a(EXLCZ)995470000002388993
100   $a20040827d1999      ua             0
101 0 $aeng
135   $aurcn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aImprovements to the DRASTIC ground-water vulnerability mapping method$b[electronic resource] /$fMichael G. Rupert
210  1$a[Reston, Va.] :$cU.S. Dept. of the interior, U.S. Geological Survey,$d[1999]
215   $a6 pages $cdigital, PDF file
225 1 $aUSGS fact sheet ;$vFS-006-99
300   $aTitle from PDF title screen (viewed Aug. 27, 2004).
300   $aAt head of title: National Water-Quality Assessment Program -- NAWQA.
300   $a"March 1999."
320   $aIncludes bibliographical references.
606   $aGroundwater$xPollution$xMeasurement$xMethodology
606   $aGroundwater$xQuality$zUnited States
615  0$aGroundwater$xPollution$xMeasurement$xMethodology.
615  0$aGroundwater$xQuality
700   $aRupert$b Michael$f1959-$01391555
712 02$aNational Water-Quality Assessment Program (U.S.)
712 02$aGeological Survey (U.S.)
801  0$bGPO
801  1$bGPO
801  2$bOCLCQ
801  2$bOCLCG
801  2$bGPO
906   $aBOOK
912   $a9910697595503321
996   $aImprovements to the DRASTIC ground-water vulnerability mapping method$93522670
997   $aUNINA