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1
di Dodge, Clifford H.
[Harrisburg: Pennsylvania Geological Survey, 2005
[Harrisburg: Pennsylvania Geological Survey, 2005
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Documento governativo
Libro
2
di Russell, Bill, 1935-
University Park, Pa. : Pennsylvania State University Press, 2006
University Park, Pa. : Pennsylvania State University Press, 2006
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Libro
3
Washington, DC : American Chemical Society, 1993
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Libro
4
di Branner, John Casper, 1850-1922
[Philadelphia?, Pa.] : [American Philosophical Society], 1886
[Philadelphia?, Pa.] : [American Philosophical Society], 1886
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Libro
5
6
di Willard, Bradford, 1894-1973
Harrisburg [Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1976
Harrisburg [Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1976
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7
di Ashley, Geo. H. (George Hall), 1866-1951
Harrisburg [Pa.] : Pennsylvania. Bureau of Topographic and Geologic Survey, 1922
2nd ed.
Harrisburg [Pa.] : Pennsylvania. Bureau of Topographic and Geologic Survey, 1922
2nd ed.
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8
di Frazer, Persifor, 1844-1909
Harrisburg [Pa.] : Pub. by the Board of commissioners for the Second geological survey, 1876
Harrisburg [Pa.] : Pub. by the Board of commissioners for the Second geological survey, 1876
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9
di Richardson, G. B. (George Burr), 1872-1949
Washington : Govt. Print. Off., 1936
Washington : Govt. Print. Off., 1936
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Libro
10
di Sisler, James D. (James Donaldson), 1894-
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Department of Internal Affairs, Bureau of Topographic and Geological Survey, 1924
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Department of Internal Affairs, Bureau of Topographic and Geological Survey, 1924
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11
12
di Gray, Carlyle
Harrisburg, [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1958
Harrisburg, [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1958
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Libro
13
Harrisburg, Pa. : Field Conference of Pennsylvania Geologists, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1980
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Atti del Convegno
Libro
14
di Rooney, Eric M.
[California, PA : California University of Pennsylvania], 1996
[California, PA : California University of Pennsylvania], 1996
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Tesi
Libro
15
di Ashley, Geo. H. (George Hall), 1866-1951
Harrisburg : Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey, 1969
Harrisburg : Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey, 1969
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16
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Periodico
17
di Socolow, Arthur A.
Harrisburg, Pa. : Pennsylvania Topographic and Geologic Survey, 1961
Harrisburg, Pa. : Pennsylvania Topographic and Geologic Survey, 1961
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Libro
18
di MacLachlan, David B.
Harrisburg [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1975
Harrisburg [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1975
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19
20
di Thalkar, Tania Lin
1995
1995
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Tesi
Libro