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Institution
Collection
Subject
Geology
29
Mines and mineral resources
25
Geology, Stratigraphic
11
Pennsylvania
9
Coal
8
Natural gas
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8
Paleontology
7
Anthracite coal
6
Petroleum
4
Carbonates
4
Gold mines and mining
4
Historic sites
4
New Jersey
3
Coal mines and mining
3
Environmental monitoring
3
Limestone
3
Oil fields
3
Ore deposits
3
Physical geography
3
Water-supply
2
Delaware Water Gap (N.J. and Pa.)
2
Forest soils
2
Geology, Economic
2
Igneous rocks
2
Magnetite
2
Mineralogy
2
New York (State)
2
Paleobotany
2
Petrology
2
River channels
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Author
51
Geological Survey (U.S.)
44
Geological Survey (U.S.),
25
Wood, Gordon H. 1919-
20
Pennsylvania. Bureau of Topographic and Geologic Survey
16
Epstein, Jack Burton, 1935-
15
Drake, Avery Ala, 1927-
more ...
7
Thornberry, Trista L.,
7
Trexler, J. Peter, 1926-
6
Arndt, Harold H.
6
Kent, Bion H. 1925-
5
Epstein, Anita G., 1937-
5
Roen, John B.
5
Schweinfurth, Stanley P.
4
Bascom, F. 1862-1945
4
Denny, Charles Storrow, 1911-
4
Gannett, Henry, 1846-1914
4
Jonas, Anna I. 1881-1974,
4
Natural Resource Program Center (U.S.),
4
Stose, George Willis, 1869-1960
4
Stose, George Willis, 1869-1960,
3
Bascom, F. 1862-1945,
3
Berryhill, Henry L., Jr. 1921-2013
3
Clapp, Frederick G. 1879-1944
3
De Witt, Wallace, Jr., 1920-2012
3
Field Conference of Pennsylvania Geologists
3
Jonas, Anna I. 1881-1974
3
Kehn, Thomas M.
3
Knopf, Eleanora Frances Bliss, 1883-
3
Lash, Gary George
3
Lyttle, Peter T.
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Language
Genre
Literary Form
Era
Region
Pennsylvania
22
Schuylkill County
21
New Jersey
11
Washington County
9
Carbon County
8
Lehigh County
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8
New York (State)
8
Northampton County
8
Northumberland County
7
Alaska
7
Berks County
6
Greene County
6
Monroe County
6
United States
5
Ohio
5
West Virginia
4
Bucks County
4
North America
4
York County
3
Allegheny County
3
California
3
Centre County
3
Clinton County
3
Columbia County
3
Dauphin County
3
Lackawanna County
3
Lebanon County
3
Potter County
3
Warren County
3
Wyoming
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Year of Publication