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035   $a(EXLCZ)995470000002372920
100   $a20070508d2007      ua             0
101 0 $aeng
135   $aurmn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aVertical gradients in water chemistry and age in the northern High Plains Aquifer, Nebraska, 2003$b[electronic resource] /$fby P.B. McMahon, J.K. Bo?hlke, and C.P. Carney
210  1$aReston, Va. :$cU.S. Dept. of the Interior, U.S. Geological Survey,$d2007.
215   $avii, 58 pages $cdigital, PDF file
225 1 $aScientific investigations reports ;$v2006-5294
300   $aTitle from title screen (viewed May 7, 2007)
300   $a"National Water-Quality Assessment Program."
320   $aIncludes bibliographical references (pages 35-40).
606   $aGroundwater$zNebraska
606   $aWater chemistry$zNebraska
606   $aWater quality$zNebraska
607   $aHigh Plains Aquifer
615  0$aGroundwater
615  0$aWater chemistry
615  0$aWater quality
700   $aMcMahon$b Peter B$01387740
701   $aBohlke$b J. K$01418802
701   $aCarney$b C. P$01421602
712 02$aNational Water-Quality Assessment Program (U.S.)
712 02$aGeological Survey (U.S.)
801  0$bGPO
801  1$bGPO
906   $aBOOK
912   $a9910695886703321
996   $aVertical gradients in water chemistry and age in the northern High Plains Aquifer, Nebraska, 2003$93543356
997   $aUNINA