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100   $a20040802d1999      ua             0
101 0 $aeng
135   $aurcn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aWater-quality assessment of south-central Texas$b[electronic resource] $ecomparison of water quality in surface-water samples collected manually and by automated samplers /$f[Patricia B. Ging]
210  1$a[Reston, Va.] :$cU.S. Dept. of the Interior, U.S Geological Survey,$d[1999]
215   $a6 pages $cdigital, PDF file
225 1 $aUSGS fact sheet ;$vFS-172-99
300   $aTitle from PDF title screen (viewed Aug. 2, 2004).
300   $a"November 1999."
320   $aIncludes bibliographical references.
517   $aWater-quality assessment of south-central Texas 
606   $aWater quality$zTexas
606   $aGroundwater$xQuality$zTexas
615  0$aWater quality
615  0$aGroundwater$xQuality
700   $aGing$b Patricia B$01383683
712 02$aGeological Survey (U.S.)
801  0$bGPO
801  1$bGPO
801  2$bOCLCQ
801  2$bGPO
906   $aBOOK
912   $a9910697410903321
996   $aWater-quality assessment of South-Central Texas$93432425
997   $aUNINA