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Subject: Nutrient pollution of water
Author: Pennsylvania. Department of Environmental Protection
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Pennsylvania. Department of Environmental Protection
6
Geological Survey (U.S.)
4
Geological Survey (U.S.),
3
Koerkle, Edward H.
3
Koerkle, Edward H.,
2
Hall, David W.
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2
Hall, David W.,
2
Lietman, Patricia L.
2
Lietman, Patricia L.,
1
Brightbill, Robin A.
1
Gustafson-Minnich, Linda C.
1
Gustafson-Minnich, Linda C.,
1
Koerkle, Edward J.
1
Langland, Michael J.
1
Maryland. Department of Natural Resources
1
Moyer, Douglas L.
1
Senus, Michael P.
1
United States. Environmental Protection Agency
1
Virginia. Department of Environmental Quality
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