Suggested Topics within your search.
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Geology
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16
History
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1
by Quigley, Carol Ann
1989
1989
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Thesis
Book
2
by Schaible, Ronald David
1990
1990
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Thesis
Book
3
by Rizzo, George S.
1989
1989
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Thesis
Book
4
by Kirkland, Jane
Lionville, PA : Stillwater Pub., 2001
Lionville, PA : Stillwater Pub., 2001
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Book
5
by Lewis, Enoch, 1776-1856
Philadelphia : E.H. Butler, H. Orr, 1848
Philadelphia : E.H. Butler, H. Orr, 1848
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Book
6
7
by Lium, Bruce W.
Doraville, Georgia : U.S. Geological Survey, 1977
Doraville, Georgia : U.S. Geological Survey, 1977
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Book
8
Philadelphia, Collins, Printer, 1859
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Book
9
by Barton, Benjamin Smith, 1766-1815
London, Taylor & Francis, 1883
London, Taylor & Francis, 1883
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Book
10
by Burns, Frank L. (Franklin Lorenzo), 1869-1946
Boston : R. G. Badger, 1919
Boston : R. G. Badger, 1919
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Book
11
12
by Lesley, J. P. (J. Peter), 1819-1903
Harrisburg : Board of Commissioners for the Geological Survey, 1889
Harrisburg : Board of Commissioners for the Geological Survey, 1889
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Book
13
[Oakmont, Pa.] : Tom Diez Natural History Programs, 2010
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Unknown
14
by Marshall, Humphry, 1722-1801
Philadelphia : Printed by J. Crukshank, 1785
Philadelphia : Printed by J. Crukshank, 1785
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Book
15
16
by Gordon, Samuel George, 1897-1952
Philadelphia : [s.n.], 1922
Philadelphia : [s.n.], 1922
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Book
17
[Oakmont, Pa.] : Tom Diez Natural History Programs, 2007
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Unknown
18
by Kirkland, Jane
Lionville, PA : Stillwater Pub., 2004
Lionville, PA : Stillwater Pub., 2004
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Book
19
by Wood, Merrill, 1908-1992
University Park : College of Agriculture, Pennsylvania State University, 1973
University Park : College of Agriculture, Pennsylvania State University, 1973
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Book
20
by Lesquereux, Leo, 1806-1889
Harrisburg : Board of Commissioners for the Second Geological Survey, 1879
Harrisburg : Board of Commissioners for the Second Geological Survey, 1879
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Government Document
Book