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Institution
Subject
Water quality
14
Nutrient pollution of water
8
Agriculture Environmental aspects
7
Groundwater
7
Hydrology
6
Stream measurements
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5
Groundwater Quality
5
Hydrogeology
5
Water resources development
4
Agricultural pollution
4
Fertilizers Environmental aspects
4
Streamflow
4
Water-supply
3
Coal mines and mining Environmental aspects
3
Land use Environmental aspects
3
Rivers
3
Strip mining Environmental aspects
3
Water quality management
3
Wetlands
2
Acid pollution of rivers, lakes, etc
2
Acid precipitation (Meteorology) Environmental aspects
2
Groundwater Pollution
2
Groundwater flow Measurement
2
Plant nutrients Environmental aspects
2
Runoff
2
Sediment transport
2
Solvent wastes Recycling
2
Stream conservation
2
Streamflow Computer simulation
2
Susquehanna River, West Branch (Pa.)
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Author
45
Geological Survey (U.S.)
35
Geological Survey (U.S.),
15
Pennsylvania. Department of Environmental Protection
8
Barker, James L., 1936-
6
Chester County Water Resources Authority
6
Fishel, David K.
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6
Koerkle, Edward H.
6
Susquehanna River Basin Commission
5
Fishel, David K.,
5
United States. Environmental Protection Agency
4
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
3
Chesapeake Bay Program (U.S.)
3
Langland, Michael J.,
3
Pennsylvania. Bureau of Mining and Reclamation
3
Wood, Charles R.
2
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
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Language
Genre
Literary Form
Region
Pennsylvania
10
Conestoga River Watershed
9
Chester County
4
Somerset County
4
Susquehanna River, West Branch
3
Fayette County
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3
Lancaster County
3
York County
2
Adams County
2
Delaware
2
Erie County
2
Indiana County
2
Lebanon County
2
Maryland
2
Oley (Township)
2
Schuylkill County
2
Susquehanna River, West Branch (Pa.)
2
Swatara Creek
2
United States
2
Wayne County
1
Allegheny County
1
Allegheny Portage Railroad National Historic Site
1
Bald Eagle Creek Watershed (Blair County-Clinton County)
1
Bedford County
1
Berks County
1
Blue Marsh Lake (Pa.)
1
Camden Region
1
Carbon County
1
Chesapeake Bay (Md. and Va.)
1
Clarion County
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Year of Publication