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Institution
Subject
85
Water quality
14
Nutrient pollution of water
11
Water quality Measurement
9
Hydrogeology
8
Agriculture Environmental aspects
8
Groundwater Quality
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7
Groundwater
7
Hydrology
7
Water-supply
6
Stream measurements
5
Coal mines and mining Environmental aspects
5
Streamflow
5
Water resources development
4
Agricultural pollution
4
Fertilizers Environmental aspects
3
Land use Environmental aspects
3
Rivers
3
Strip mining Environmental aspects
3
Terracing
3
Water quality management
3
Wetlands
2
Acid mine drainage Environmental aspects
2
Acid pollution of rivers, lakes, etc
2
Acid precipitation (Meteorology) Environmental aspects
2
Groundwater Pollution
2
Groundwater Sampling
2
Groundwater flow Measurement
2
Plant nutrients Environmental aspects
2
Runoff
2
Sediment transport
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Author
52
Geological Survey (U.S.)
41
Geological Survey (U.S.),
20
Pennsylvania. Department of Environmental Protection
8
Barker, James L., 1936-
8
Chester County Water Resources Authority
7
Fishel, David K.
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7
Koerkle, Edward H.
7
Susquehanna River Basin Commission
6
Fishel, David K.,
6
Pennsylvania. Department of Environmental Resources
6
Sloto, Ronald A.
6
Sloto, Ronald A.,
6
United States. National Park Service
5
Lietman, Patricia L.
5
United States. Environmental Protection Agency
4
Koerkle, Edward H.,
4
Langland, Michael J.
4
Pennsylvania. Bureau of Land and Water Conservation
4
Pennsylvania. Bureau of Mining and Reclamation
4
Pennsylvania. Bureau of State Parks
4
United States. Army. Corps of Engineers. Philadelphia District
3
Chesapeake Bay Program (U.S.)
3
Galeone, Daniel G.
3
Kostelnik, Kevin M.
3
Langland, Michael J.,
3
Lietman, Patricia L.,
3
Pennsylvania. Bureau of Topographic and Geologic Survey
3
Senior, Lisa A.
3
United States. Office of Surface Mining Reclamation and Enforcement
3
Witt, Emitt C.
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Language
Genre
Literary Form
Region
98
Pennsylvania
11
Chester County
10
Conestoga River Watershed
4
Fayette County
4
Lancaster County
4
Somerset County
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4
Susquehanna River, West Branch
3
York County
2
Adams County
2
Delaware
2
Erie County
2
Indiana County
2
Lebanon County
2
Maryland
2
Montgomery County
2
Oley (Township)
2
Schuylkill County
2
Susquehanna River, West Branch (Pa.)
2
Swatara Creek
2
United States
2
Valley Forge National Historical Park
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
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Year of Publication