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200 10$aEvaluation of agricultural best-management practices in the Conestoga River headwaters, Pennsylvania $ehydrology of a small carbonate site near Ephrata, Pennsylvania, prior to implementation of nutrient management /$fby Edward H. Koerkle [and four others]
210  1$aLemoyne, Pennsylvania :$cU.S. Geological Survey,$d1996.
215   $a1 online resource (viii, 88 pages) $cillustrations, maps
225 1 $aWater-resources investigations report ;$v93-4173
225 1 $aWater-quality study of the Conestoga River Headwaters, Pennsyvlania
300   $a"Prepared in cooperation with the Pennsylvania Department of Environmental Protection."
320   $aIncludes bibliographical references (pages 86-88).
517   $aEvaluation of agricultural best-management practices in the Conestoga River headwaters, Pennsylvania 
606   $aWater quality$zPennsylvania$zConestoga River Watershed
606   $aNutrient pollution of water$zPennsylvania$zConestoga River Watershed
606   $aAgriculture$xEnvironmental aspects$zPennsylvania$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$aNutrient pollution of water
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615  7$aAgriculture$xEnvironmental aspects.
615  7$aNutrient pollution of water.
615  7$aWater quality.
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712 02$aGeological Survey (U.S.),
712 02$aPennsylvania.$bDepartment of Environmental Protection.
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