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Institution
Collection
Subject
52
Geology
50
Geomagnetism
45
Water quality
37
Groundwater
26
Hydrogeology
22
Groundwater Pollution
more ...
17
Groundwater Quality
17
Stream measurements
16
Groundwater flow
15
Geophysical well logging
15
Water Pollution
15
Water-supply
13
Pennsylvania
13
Streamflow
13
Water table
12
Aquifers
10
Hydrology
9
Magnetic anomalies
9
Nutrient pollution of water
7
Coal Geology
7
Floods
7
Uranium ores
7
Water quality biological assessment
7
Water resources development
6
Anthracite coal
6
Geology, Stratigraphic
6
Water quality Measurement
6
Water quality management
5
Allegheny County (Pa.)
5
Coal
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Author
Geological Survey (U.S.)
49
Bromery, Randolph W. 1926-2013
46
Zandle, Gerald L.
33
Chester County Water Resources Authority
30
Pennsylvania. Department of Environmental Protection
29
Sloto, Ronald A.
more ...
24
United States. Environmental Protection Agency
17
Pennsylvania. Bureau of Topographic and Geologic Survey
16
Wood, Gordon H. 1919-
15
Senior, Lisa A.
14
Conger, Randall W.
13
Reif, Andrew G.
11
Schreffler, Curtis L.
10
Epstein, Jack Burton, 1935-
10
Pennsylvania. Department of Environmental Resources
10
Reed, Lloyd A.
9
Drake, Avery Ala, 1927-
9
Koerkle, Edward H.
9
Low, Dennis J.
9
Susquehanna River Basin Commission
8
Wood, Charles R.
7
Appalachian Regional Commission
7
Chester County (Pa.). Health Department
7
Henderson, John R.
7
Langland, Michael J.
7
Stuckey, Marla H.
6
Arndt, Harold H.
6
Barker, James L., 1936-
6
Delaware River Basin Commission
6
Fishel, David K.
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Language
Genre
Literary Form
Region
Pennsylvania
39
Chester County
25
Bucks County
21
Berks County
21
Lancaster County
21
Schuylkill County
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17
Maryland
17
New Jersey
15
Montgomery County
13
Lebanon County
13
York County
12
Lehigh County
12
United States
10
New York (State)
10
West Virginia
9
Adams County
9
Northampton County
9
Northumberland County
8
Allegheny County
8
Dauphin County
7
Carbon County
7
Cumberland County
7
Washington County
6
Allegheny County (Pa.)
6
Conestoga River Watershed
6
Philadelphia
5
Delaware
5
Fayette County
5
Monroe County
4
Columbia County
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Call Number
Year of Publication