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100   $a20190518d1982      ua             0
101 0 $aeng
135   $aurbn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aModifications and corrections to the finite-difference model for simulation of three-dimensional ground-water flow /$fby Lynn J. Torak
210  1$aReston, Virginia :$cU.S. Geological Survey,$d1982.
215   $a1 online resource (63 pages in various pagings) $cillustrations
225 1 $aWater-resources investigations ;$v82-4025
320   $aIncludes bibliographical references (page 30).
606   $aGroundwater flow$xMathematical models
606   $aGroundwater flow$xMathematical models$2fast
615  0$aGroundwater flow$xMathematical models.
615  7$aGroundwater flow$xMathematical models.
700   $aTorak$b L. J.$01382735
712 02$aGeological Survey (U.S.),
801  0$bOCLCE
801  1$bOCLCE
801  2$bCOP
801  2$bOCLCF
801  2$bONB
801  2$bOCLCQ
801  2$bGPO
906   $aBOOK
912   $a9910715118303321
996   $aModifications and corrections to the finite-difference model for simulation of three-dimensional ground-water flow$93466811
997   $aUNINA