LEADER 01821nam  2200397   450 
001 9910717197103321
005 20220112164401.0
035   $a(CKB)5470000002528240
035   $a(OCoLC)1291718833
035   $a(EXLCZ)995470000002528240
100   $a20220112d2011      ua             0
101 0 $aeng
135   $aurcn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aRecent (2008-10) water quality in the Barton Springs segment of the Edwards Aquifer and its contributing zone, central Texas, with emphasis on factors affecting nutrients and bacteria /$fby Barbara J. Mahler [and three others] ; in cooperation with the Texas Commission on Environmental Quality
205   $aRevised and reprinted: 2011.
210  1$aReston, Virginia :$cU.S. Department of the Interior, U.S. Geological Survey,$d2011.
215   $a1 online resource (vii, 66 pages) $ccolor illustrations, color maps
225 1 $aScientific investigations report ;$v2011-5139
320   $aIncludes bibliographical references (pages 54-57).
517   $aRecent 
606   $aWater quality$zTexas$zBarton Springs/Edwards Aquifer Conservation District
606   $aWater$xPollution$zTexas$zBarton Springs/Edwards Aquifer Conservation District
615  0$aWater quality
615  0$aWater$xPollution
700   $aMahler$b B. J$g(Barbara June),$f1959-$01382534
712 02$aGeological Survey (U.S.),
712 02$aTexas Commission on Environmental Quality.
801  0$bGPO
801  1$bGPO
906   $aBOOK
912   $a9910717197103321
996   $aRecent (2008-10) water quality in the Barton Springs segment of the Edwards Aquifer and its contributing zone, central Texas, with emphasis on factors affecting nutrients and bacteria$93546942
997   $aUNINA