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100   $a20080414d2005      ua              
101 0 $aeng
120   $ab||||||||||||
121   $a|||||||||
124   $bd
135   $aurcn|||||||||
181   $ccrd$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aNitrate in ground water$b[electronic resource] $eusing a model to simulate the probability of nitrate contamination of shallow ground water in the conterminous United States /$fby Kerie J. Hitt and Bernard T. Nolan
210  1$aReston, Va. :$cUSGS National Water-Quality Assessment Program,$d2005.
215   $a1 electronic map $cHTML, digital, PDF file
225 1 $aScientific investigations map ;$v2881
300   $aTitle from HTML index page (viewed on Apr. 14, 2008)
300   $aIncludes text, col. ill., and ancillary maps.
517   $aNitrate in ground water 
606   $aGroundwater$xPollution$zUnited States$vMaps
606   $aAgricultural pollution$zUnited States$vMaps
608   $aMaps.$2lcgft
615  0$aGroundwater$xPollution
615  0$aAgricultural pollution
700   $aHitt$b Kerie J$01382667
701   $aNolan$b Bernard T.$f1954-$01383937
712 02$aGeological Survey (U.S.)
712 02$aNational Water-Quality Assessment Program (U.S.)
801  0$bGPO
801  1$bGPO
906   $aBOOK
912   $a9910696578103321
996   $aNitrate in ground water$93455902
997   $aUNINA