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Subject
Water quality
3
Nutrient pollution of water
2
Streamflow Computer simulation
1
Agricultural pollution
1
Agriculture Environmental aspects
1
Mill Creek Watershed (Lancaster County, Pa.)
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1
Muddy Run Watershed (Lancaster County, Pa.)
1
Plant nutrients Environmental aspects
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Author
6
Geological Survey (U.S.)
Koerkle, Edward H.
5
Pennsylvania. Department of Environmental Protection
2
Delaware River Basin Commission
2
Delaware. Department of Natural Resources and Environmental Control
2
Senior, Lisa A.
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1
Bilger, Michael D.
1
Gustafson-Minnich, Linda C.
1
Pennsylvania. Bureau of Land and Water Conservation
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