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Format: eBook
Institution
Collection
Format
Subject
36
Water quality
8
Nutrient pollution of water
5
Hydrogeology
5
Hydrology
5
Water quality Measurement
4
Agriculture Environmental aspects
more ...
4
Groundwater Quality
4
Water-supply
3
Groundwater
3
Rivers
2
Agricultural pollution
2
Coal mines and mining Environmental aspects
2
Fertilizers Environmental aspects
2
Land use Environmental aspects
2
Runoff
2
Stream measurements
2
Streamflow
2
Terracing
2
Water quality monitoring stations
2
Water resources development
2
Wetlands
1
Acid pollution of rivers, lakes, etc
1
Acid precipitation (Meteorology) Environmental aspects
1
Agriculture
1
Aquatic insects
1
Bacteria
1
Bacterial pollution of water
1
Bed load
1
Blue Marsh Lake (Pa.)
1
Curwensville (Pa.)
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Author
41
Geological Survey (U.S.),
6
Fishel, David K.,
6
Pennsylvania. Department of Environmental Protection
6
Sloto, Ronald A.,
4
Barker, James L., 1936-
4
Koerkle, Edward H.,
more ...
3
Chester County Water Resources Authority
3
Langland, Michael J.,
3
Lietman, Patricia L.,
3
Susquehanna River Basin Commission
3
United States. Environmental Protection Agency
3
United States. National Park Service
3
Wood, Charles R.,
2
Blickwedel, Roy S.,
2
Chesapeake Bay Program (U.S.)
2
Galeone, Daniel G.,
2
Gustafson-Minnich, Linda C.,
2
Hainly, Robert A.,
2
Hall, David W.,
2
Pennsylvania. Bureau of Land and Water Conservation
2
Pennsylvania. Bureau of State Parks
2
Pennsylvania. Bureau of Topographic and Geologic Survey
2
United States. Army. Corps of Engineers. Philadelphia District
2
Williams, Donald R.,
1
Allegheny County (Pa.). Health Department
1
Allegheny County Sanitary Authority
1
Alliance for the Chesapeake Bay
1
Becher, Albert E.,
1
Bilger, Michael D.,
1
Buckwalter, Theodore F.,
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Language
Literary Form
Region
42
Pennsylvania
4
Chester County
4
Conestoga River Watershed
2
Somerset County
2
Susquehanna River, West Branch
1
Adams County
more ...
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
Dauphin County
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
Lackawaxen River
1
Lebanon County
1
Maryland
1
Montgomery County
1
Neshaminy State Park
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Year of Publication