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Institution
Collection
Subject
72
Geology
52
Geomagnetism
17
Water table
16
Groundwater
13
Anthracite coal
11
Aquifers
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11
Pennsylvania
9
Magnetic anomalies
7
Coal Geology
6
Atmospheric radioactivity
5
Allegheny County (Pa.)
4
Allegheny National Forest (Pa.)
4
Floods
4
New York (State)
3
Coal mines and mining
3
Historic sites
3
Landslides
3
Radioactivity Measurement
3
West Virginia
2
Coal
2
Geology, Structural
2
Motor vehicles Recreational use
2
National parks and reserves
2
Pittsburgh Region (Pa.)
2
Springfield (Bucks County, Pa. : Township)
2
Subsidences (Earth movements)
1
Allegheny County (Pa.) Climate
1
Allegheny National Forest (Pa.) Recreational use
1
Armstrong County (Pa.)
1
Automobile driving
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Author
139
Geological Survey (U.S.)
49
Bromery, Randolph W. 1926-2013
48
Zandle, Gerald L.
24
Wood, Gordon H. 1919-
15
Chester County Water Resources Authority
15
Geological Survey (U.S.),
more ...
14
Pennsylvania. Bureau of Topographic and Geologic Survey
10
Drake, Avery Ala, 1927-
9
Epstein, Jack Burton, 1935-
8
Appalachian Regional Commission
8
Henderson, John R.
7
Arndt, Harold H.
7
New Hope (Pa.)
6
Kent, Bion H. 1925-
6
Trexler, J. Peter, 1926-
5
Boynton, G. R. 1935-
5
Briggs, Reginald P., 1929-2009
5
McManus, B. Craig
5
Pittillo, D. R.
5
Schreffler, Curtis L.
5
Schweinfurth, Stanley P.
4
Bennett, Bruce L. 1917-2003
4
Danilchik, Walter
4
Kohl, William R.
4
Roen, John B.
3
Berryhill, Henry L., Jr. 1921-2013
3
Kehn, Thomas M.
3
Lash, Gary George
3
McManus, B. Craig,
3
Minard, James P.
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Language
Genre
Literary Form
Region
Pennsylvania
26
Schuylkill County
18
Bucks County
18
Chester County
18
New Jersey
16
Berks County
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12
Lancaster County
11
York County
10
Lebanon County
10
Lehigh County
10
Northampton County
10
Northumberland County
9
Allegheny County
9
Washington County
8
Montgomery County
7
Dauphin County
6
Adams County
6
Allegheny County (Pa.)
6
New York (State)
5
Cumberland County
5
Greene County
5
Warren County
4
Allegheny National Forest
4
Allegheny National Forest (Pa.)
4
Columbia County
4
Monroe County
3
Carbon County
3
Delaware
3
Pittsburgh Region
3
West Virginia
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Call Number
Year of Publication