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100   $a20101115d1997      ua             0
101 0 $aeng
135   $aurbn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aEvaluation of agricultural best-management practices in the Conestoga River Headwaters, Pennsylvania $eeffects of nutrient management on quality of surface runoff at a small carbonate-rock site near Ephrata, Pennsylvania, 1984-90 /$fby David W. Hall, Patricia L. Lietman, and Edward H. Koerkle ; prepared in cooperation with the Pennsylvania Department of Environmental Protection
210  1$aLemoyne, Pennsylvania :$cU.S. Geological Survey,$d1997.
215   $a1 online resource (viii, 59 pages) $cillustrations, maps
225 1 $aWater-resources investigations report ;$v95-4143
225 1 $aWater-quality study of the Conestoga River Headwaters, Pennsylvania
320   $aIncludes bibliographical references (pages 57-59).
517   $aEvaluation of agricultural best-management practices in the Conestoga River Headwaters, Pennsylvania 
606   $aWater quality$zPennsylvania$zConestoga River Watershed
606   $aAgriculture$xEnvironmental aspects$zPennsylvania$zConestoga River Watershed
606   $aNutrient pollution of water$zPennsylvania$zConestoga River Watershed
606   $aAgriculture$xEnvironmental aspects$2fast
606   $aNutrient pollution of water$2fast
606   $aWater quality$2fast
607   $aPennsylvania$zConestoga River Watershed$2fast
615  0$aWater quality
615  0$aAgriculture$xEnvironmental aspects
615  0$aNutrient pollution of water
615  7$aAgriculture$xEnvironmental aspects.
615  7$aNutrient pollution of water.
615  7$aWater quality.
700   $aHall$b David W.$086645
702   $aLietman$b Patricia L.
702   $aKoerkle$b Edward H.
712 02$aGeological Survey (U.S.),
712 02$aPennsylvania.$bDepartment of Environmental Protection.
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906   $aBOOK
912   $a9910716586303321
996   $aEvaluation of agricultural best-management practices in the Conestoga River Headwaters, Pennsylvania$93469623
997   $aUNINA