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Region: Pennsylvania
Institution
Collection
Subject
61
Water quality
41
Groundwater
41
Hydrogeology
19
Groundwater Pollution
19
Groundwater flow
17
Nutrient pollution of water
more ...
17
Water table
16
Groundwater Quality
16
Stream measurements
14
Aquifers
12
Streamflow
12
Water Pollution
11
Water-supply
9
Pesticides Environmental aspects
9
Water quality Measurement
8
Agriculture Environmental aspects
8
Geophysical well logging
7
Coal mines and mining Environmental aspects
6
Hydrology
6
Land use Environmental aspects
6
Sediment transport
6
Suspended sediments
5
Flood control
5
Water resources development
4
Acid pollution of rivers, lakes, etc
4
Fertilizers Environmental aspects
4
Groundwater Sampling
4
Reservoir sedimentation
4
Sedimentation and deposition
4
Water levels
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Author
119
Geological Survey (U.S.)
102
Geological Survey (U.S.),
31
Chester County Water Resources Authority
22
Pennsylvania. Department of Environmental Protection
22
United States. Environmental Protection Agency
18
Sloto, Ronald A.
more ...
18
Sloto, Ronald A.,
12
Susquehanna River Basin Commission
11
Pennsylvania. Department of Environmental Resources
10
Reed, Lloyd A.
9
Barker, James L., 1936-
9
Pennsylvania. Bureau of Topographic and Geologic Survey
8
Senior, Lisa A.
8
Senior, Lisa A.,
7
Delaware River Basin Commission
7
Fishel, David K.
7
Koerkle, Edward H.
7
Pennsylvania. Bureau of Land and Water Conservation
7
Reed, Lloyd A.,
7
Schreffler, Curtis L.,
6
Conger, Randall W.
6
Fishel, David K.,
6
National Water-Quality Assessment Program (U.S.)
6
New Hope (Pa.)
6
Philadelphia (Pa.). Water Department
6
Schreffler, Curtis L.
6
United States. National Park Service
5
Hainly, Robert A.
5
Koerkle, Edward H.,
5
Langland, Michael J.
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Language
Genre
Literary Form
Region
Pennsylvania
34
Chester County
16
Maryland
15
Bucks County
10
Lancaster County
8
Conestoga River Watershed
more ...
8
Fayette County
6
Delaware
6
Montgomery County
6
Susquehanna River Watershed
5
Adams County
5
Lebanon County
4
Berks County
4
New Castle County
4
New Jersey
4
Philadelphia
4
Philadelphia Region
4
Somerset County
4
Susquehanna River, West Branch
4
United States
4
Valley Forge National Historical Park
3
Cumberland County
3
Philadelphia Metropolitan Area
3
Susquehanna River
3
York County
2
Brandywine Creek Watershed (Pa. and Del.)
2
Cambria County
2
Camden County
2
Carroll County
2
Clearfield County
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Year of Publication