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100   $a20080828d2005      ua             0
101 0 $aeng
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 00$aAge and quality of ground water and sources of nitrogen in the surficial aquifers in Pumpkin Creek Valley, Western Nebraska, 2000$b[electronic resource] /$fby G.V. Steel ... [and others] ; prepared in cooperation with the North Platte Natural Resources District
210  1$aReston, Va. :$cU.S. Dept. of the Interior, U.S. Geological Survey,$d2005.
215   $avi, 68 pages $cdigital, PDF file
225 1 $aScientific investigations report ;$v2005-5157
300   $aTitle from PDF t.p. (viewed on Aug. 28, 2008).
606   $aWater quality$zNebraska
615  0$aWater quality
701   $aSteele$b G. V$01395537
712 02$aNorth Platte Natural Resources District (Neb.)
712 02$aGeological Survey (U.S.)
801  0$bGPO
801  1$bGPO
801  2$bGPO
906   $aBOOK
912   $a9910698549403321
996   $aAge and quality of ground water and sources of nitrogen in the surficial aquifers in Pumpkin Creek Valley, Western Nebraska, 2000$93454507
997   $aUNINA