Suggested Topics within your search.
Suggested Topics within your search.
1
2
by Gordon, Samuel G. (Samuel George), 1897-1952
Philadelphia [s.n.] 1922
Philadelphia [s.n.] 1922
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Book
3
by Barnes, John Henry, 1946-
Harrisburg [Pa.] : Commonwealth of Pennsylvania, Dept. of Conservation and Natural Resources, Ofiice of Conservaiton and Engineering Services, Bureau of Topographic and Geologic Survey, 2004
4th ed.
Harrisburg [Pa.] : Commonwealth of Pennsylvania, Dept. of Conservation and Natural Resources, Ofiice of Conservaiton and Engineering Services, Bureau of Topographic and Geologic Survey, 2004
4th ed.
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Government Document
Book
4
by Gordon, Samuel George, 1897-
[s.l.] : Friends of Mineralogy, Region 3, 1973
[s.l.] : Friends of Mineralogy, Region 3, 1973
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Book
5
by Beck, Herbert H. (Herbert Huebener), 1875-1960
[Lancaster, Pa. : The Science press printing co.] 1952
3rd ed.
[Lancaster, Pa. : The Science press printing co.] 1952
3rd ed.
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Book
6
by Lapham, Davis M.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1963
2nd ed.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1963
2nd ed.
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Government Document
Book
7
by Barnes, John Henry, 1946-
Harrisburg, PA : Pennsylvania, Department of Conservation and Natural Resources, Office of Conservation and Engineering Services, Bureau of Topographic and Geologic Survey, 2013
Revised April 2013
Harrisburg, PA : Pennsylvania, Department of Conservation and Natural Resources, Office of Conservation and Engineering Services, Bureau of Topographic and Geologic Survey, 2013
Revised April 2013
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Government Document
Book
8
by Lapham, Davis M., Geyer, Alan R.
[Harrisburg, Pennsylvania] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1973
[Harrisburg, Pennsylvania] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1973
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Government Document
Book
9
by Lapham, Davis M.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1979
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1979
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Government Document
Book
10
by Lapham, Davis M.
[Harrisburg, Pa.] : Dept. of Internal Affairs, Topographic and Geologic Survey, 1959
[Harrisburg, Pa.] : Dept. of Internal Affairs, Topographic and Geologic Survey, 1959
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Book
11
by Eyerman, John, 1867-
Easton, Pa., [publisher not identified], 1889
Easton, Pa., [publisher not identified], 1889
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Book
12
by Gordon, Samuel G. (Samuel George), 1897-1952
New York, NY : Dover Publications 1959
New York, NY : Dover Publications 1959
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Book
13
14
by Wherry, Edgar T. (Edgar Theodore), 1885-1982
Philadelphia : [publisher not identified], 1910
Philadelphia : [publisher not identified], 1910
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Thesis
Book
15
by Gordon, Samuel George, 1897-
New York, Dover Publications 1959
New York, Dover Publications 1959
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Book
16
by Lapham, Davis M.
Harrisburg, PA. : Commonwealth of Pennsylvania [Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey], 1965
2nd ed.
Harrisburg, PA. : Commonwealth of Pennsylvania [Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey], 1965
2nd ed.
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Book
17
by Lapham, Davis M.
[Harrisburg, Pa.] : [Commonwealth of Pennsylvania], Dept. of Internal Affairs, Topographic and Geologic Survey, 1959
[1st ed.].
[Harrisburg, Pa.] : [Commonwealth of Pennsylvania], Dept. of Internal Affairs, Topographic and Geologic Survey, 1959
[1st ed.].
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Book
18
by Gordon, Samuel George, 1897-1952
Philadelphia : [s.n.], 1922
Philadelphia : [s.n.], 1922
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Book
19
by Ray, Satyabrata, 1929-
1957
1957
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Thesis
Book
20
by Barnes, John Henry, 1946-
Harrisburg [Pa.] : Commonwealth of Pennsylvania, Dept. of Conservation and Natural Resources, Ofiice of Conservaiton and Engineering Services, Bureau of Topographic and Geologic Survey, 2004
Fourth edition.
Harrisburg [Pa.] : Commonwealth of Pennsylvania, Dept. of Conservation and Natural Resources, Ofiice of Conservaiton and Engineering Services, Bureau of Topographic and Geologic Survey, 2004
Fourth edition.
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Government Document
Book