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035   $a(EXLCZ)995470000002411056
100   $a20110721d2011      ua             0
101 0 $aeng
135   $aurcn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aNitrate concentrations and potential sources in the Barton Springs segment of the Edwards Aquifer and its contributing zone, central Texas$b[electronic resource] /$fBarbara J. Mahler, MaryLynn Musgrove, and Chris Herrington
210  1$a[Reston, Va.] :$cU.S. Dept. of the Interior, U.S. Geological Survey,$d[2011]
215   $a1 online resource (4 unnumbered pages) $ccolor illustrations, color maps
225 1 $aFact sheet ;$v2011-3035
300   $aTitle from title screen (viewed on July 18, 2011).
300   $a"In cooperation with the City of Austin, City of Dripping Springs, Barton Springs/Edwards Aquifer Conservation District, Lower Colorado River Authority, Hays County, and Travis County."
300   $a"May 2011."
300   $aIncludes bibliographical references (p. [4]).
606   $aNitrates$xEnvironmental aspects$zTexas$zBarton Springs/Edwards Aquifer Conservation District
606   $aSeptic tanks$xEnvironmental aspects$zTexas$zBarton Springs/Edwards Aquifer Conservation District
615  0$aNitrates$xEnvironmental aspects
615  0$aSeptic tanks$xEnvironmental aspects
700   $aMahler$b B. J$g(Barbara June),$f1959-$01382534
701   $aMusgrove$b MaryLynn$f1964-$01394247
701   $aHerrington$b Chris$01421967
712 02$aAustin (Tex.)
712 02$aGeological Survey (U.S.)
801  0$bGPO
801  1$bGPO
906   $aBOOK
912   $a9910700794703321
996   $aNitrate concentrations and potential sources in the Barton Springs segment of the Edwards Aquifer and its contributing zone, central Texas$93544904
997   $aUNINA