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Institution
Collection
Format
Subject
Author
7
Geological Survey (U.S.)
4
Geological Survey (U.S.),
3
Chester County Water Resources Authority
2
Barton, Gary J.
2
Delaware Geological Survey
2
Delaware River Basin Commission
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2
Pike County Planning Commission (Pa.)
2
Senior, Lisa A.,
2
Sloto, Ronald A.,
1
Cecil, L. DeWayne,
1
Chichester, Douglas C.
1
McAuley, Steven D.
1
Pennsylvania. Bureau of Water Supply Management
1
Pennsylvania. Department of Environmental Protection
1
Reif, Andrew G.
1
Reif, Andrew G.,
1
Senior, Lisa A.
1
Sloto, Ronald A.
1
United States. Environmental Protection Agency
1
Vogel, Karen L.
1
Vogel, Karen L.,
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