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100   $a20101110d1991      ua             0
101 0 $aeng
135   $aurbn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
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200 12$aA steady-state unsaturated-zone model to simulate pesticide transport /$fby A.T. Rutledge and J.O. Helgesen ; prepared as part of the Toxic Waste-Ground-Water Contamination Program, U.S. Geological Survey
210  1$aLawrence, Kansas :$cU.S. Geological Survey,$d1991.
215   $a1 online resource (iv, 13 pages) $cillustrations
225 1 $aWater-resources investigations report ;$v90-4164
320   $aIncludes bibliographical references (pages 12-13).
606   $aPesticides$xEnvironmental aspects$zUnited States$xMathematical models
606   $aWater$xPollution$zUnited States$xMathematical models
606   $aGroundwater$xQuality$zUnited States
606   $aGroundwater$xQuality$2fast
606   $aPesticides$xEnvironmental aspects$xMeasurement$2fast
607   $aUnited States$2fast
615  0$aPesticides$xEnvironmental aspects$xMathematical models.
615  0$aWater$xPollution$xMathematical models.
615  0$aGroundwater$xQuality
615  7$aGroundwater$xQuality.
615  7$aPesticides$xEnvironmental aspects$xMeasurement.
700   $aRutledge$b A. T.$01381558
702   $aHelgesen$b John O.
712 02$aGeological Survey (U.S.),
712 02$aToxic Waste-Ground-Water Contamination Program (U.S.)
801  0$bOCLCE
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906   $aBOOK
912   $a9910715310003321
996   $aA steady-state unsaturated-zone model to simulate pesticide transport$93492180
997   $aUNINA