Author
Geological Survey (U.S.)
45
Geological Survey (U.S.),
35
Pennsylvania. Department of Environmental Protection
15
Barker, James L., 1936-
8
Chester County Water Resources Authority
6
Fishel, David K.
6
Koerkle, Edward H.
6
Susquehanna River Basin Commission
6
Fishel, David K.,
5
United States. Environmental Protection Agency
5
Koerkle, Edward H.,
4
Langland, Michael J.
4
Lietman, Patricia L.
4
Pennsylvania. Bureau of Land and Water Conservation
4
Pennsylvania. Bureau of State Parks
4
Pennsylvania. Department of Environmental Resources
4
Sloto, Ronald A.
4
Sloto, Ronald A.,
4
United States. Army. Corps of Engineers. Philadelphia District
4
United States. National Park Service
4
Chesapeake Bay Program (U.S.)
3
Langland, Michael J.,
3
Pennsylvania. Bureau of Mining and Reclamation
3
Wood, Charles R.
3
Blickwedel, Roy S.,
2
Chichester, Douglas C.
2
Delaware River Basin Commission
2
Delaware. Department of Natural Resources and Environmental Control
2
Durlin, Randall R.
2
Erie County (Pa.). Department of Health
2
Galeone, Daniel G.
2
Galeone, Daniel G.,
2
Gustafson-Minnich, Linda C.
2
Gustafson-Minnich, Linda C.,
2
Hainly, Robert A.
2
Hainly, Robert A.,
2
Hall, David W.
2
Hall, David W.,
2
Kostelnik, Kevin M.
2
Lietman, Patricia L.,
2
Oley (Pa. : Township)
2
Pennsylvania. Bureau of Soil and Water Conservation
2
Pennsylvania. Bureau of Topographic and Geologic Survey
2
Senior, Lisa A.
2
United States. Department of Agriculture
2
United States. Office of Surface Mining Reclamation and Enforcement
2
Williams, Donald R.,
2
Witt, Emitt C.
2
Wood, Charles R.,
2
Allegheny County (Pa.). Health Department
1
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