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Institution
Collection
Format
Subject
Water quality
8
Nutrient pollution of water
5
Hydrology
4
Agriculture Environmental aspects
4
Groundwater
3
Hydrogeology
more ...
3
Rivers
3
Water-supply
2
Agricultural pollution
2
Fertilizers Environmental aspects
2
Land use Environmental aspects
2
Runoff
2
Stream measurements
2
Streamflow
2
Streamflow Computer simulation
2
Water resources development
2
Wetlands
1
Acid pollution of rivers, lakes, etc
1
Acid precipitation (Meteorology) Environmental aspects
1
Aquatic insects
1
Bacteria
1
Bacterial pollution of water
1
Bed load
1
Benthos
1
Blue Marsh Lake (Pa.)
1
Coal mines and mining Environmental aspects
1
Curwensville (Pa.)
1
Enterobacteriaceae
1
Geology
1
Groundwater Pollution
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Author
35
Geological Survey (U.S.),
8
Pennsylvania. Department of Environmental Protection
7
Geological Survey (U.S.)
5
Fishel, David K.,
4
Barker, James L., 1936-
4
Koerkle, Edward H.,
more ...
4
Sloto, Ronald A.,
3
Chester County Water Resources Authority
3
Langland, Michael J.,
3
Susquehanna River Basin Commission
3
United States. Environmental Protection Agency
3
United States. National Park Service
2
Blickwedel, Roy S.,
2
Chesapeake Bay Program (U.S.)
2
Delaware River Basin Commission
2
Delaware. Department of Natural Resources and Environmental Control
2
Galeone, Daniel G.,
2
Gustafson-Minnich, Linda C.,
2
Hainly, Robert A.,
2
Hall, David W.,
2
Koerkle, Edward H.
2
Lietman, Patricia L.,
2
Pennsylvania. Bureau of Land and Water Conservation
2
Pennsylvania. Bureau of State Parks
2
Senior, Lisa A.
2
United States. Army. Corps of Engineers. Philadelphia District
2
Williams, Donald R.,
2
Wood, Charles R.,
1
Allegheny County (Pa.). Health Department
1
Allegheny County Sanitary Authority
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Language
Literary Form
Region
Pennsylvania
5
Chester County
4
Conestoga River Watershed
2
Delaware
2
Maryland
2
Somerset County
more ...
2
Susquehanna River, West Branch
1
Adams 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
Chesapeake Bay (Md. and Va.)
1
Conestoga River
1
Conewago Creek Watershed (Lebanon County, Dauphin County, and Lancaster County)
1
Curwensville (Pa.)
1
Eisenhower National Historic Site
1
Erie County
1
Fayette County
1
Gettysburg National Military Park
1
Harrisburg
1
Huntingdon County
1
Indiana County
1
Indiantown Gap Military Reservation
1
Lackawaxen River
1
Lancaster County
1
Lebanon County
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Year of Publication