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Geology
30
Mines and mineral resources
16
Géologie
10
Coal
3
Copper ores
3
Uranium ores
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1
由 Wells, Richard B.
Harrisburg : Bureau of Topographic and Geologic Survey, 1980
Harrisburg : Bureau of Topographic and Geologic Survey, 1980
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Government Document
图书
2
由 Taylor, Alfred R.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977
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Government Document
地图
3
由 Faill, Rodger T.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources,Bureau of Topographic and Geologic Survey, 1979
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources,Bureau of Topographic and Geologic Survey, 1979
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Government Document
图书
4
由 Strausser, Patricia R.
1976
1976
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Thesis
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5
由 Faill, Rodger T.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977
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图书
6
由 Faill, Rodger T.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977
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图书
7
由 Colton, George Willis, 1920-
Harrisburg : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey, 1968
Harrisburg : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey, 1968
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图书
8
9
由 Sisler, James D. (James Donaldson), 1894-
[Harrisburg] : Bureau of Topographic and Geological Survey, 1922
[Harrisburg] : Bureau of Topographic and Geological Survey, 1922
This item is not available through EZBorrow. Please contact your institution’s interlibrary loan office for further assistance.
图书
10
由 Faill, Rodger T.
Harrisburg : Commenwealth of Pennsylvania, Dept. Environmental Resources, Bureau of tpographic Geologic Survey, 1977
Harrisburg : Commenwealth of Pennsylvania, Dept. Environmental Resources, Bureau of tpographic Geologic Survey, 1977
This item is not available through EZBorrow. Please contact your institution’s interlibrary loan office for further assistance.
图书
11
由 Faill, Rodger T.
Harrisburg : Commenwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977
Harrisburg : Commenwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977
This item is not available through EZBorrow. Please contact your institution’s interlibrary loan office for further assistance.
图书
12
由 Smith, Robert C.
Harrisburg : Pennsylvania Geological Survey, 1984
Harrisburg : Pennsylvania Geological Survey, 1984
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图书
13
由 Sherwood, Andrew, 1848-1933
Harrisburg, Pub. by the Board of commissioners for the Second geological survey, 1880
Harrisburg, Pub. by the Board of commissioners for the Second geological survey, 1880
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图书
14
由 Faill, Rodger T.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1977
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1977
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Government Document
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15
16
由 Faill, Rodger T.
Harrisburg [Pennsylvania Topographic and Geologic Survey], 1977
Harrisburg [Pennsylvania Topographic and Geologic Survey], 1977
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图书
17
由 Colton, George Willis, 1920-
Philadelphia, Pa. : Alvah Bushnell, 1965
Philadelphia, Pa. : Alvah Bushnell, 1965
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图书
18
由 Smith, Robert Charles, 1945-
Harrisburg : Pennsylvania Geological Survey : Additional copies may be purchsed from State Book Store, 1984
Harrisburg : Pennsylvania Geological Survey : Additional copies may be purchsed from State Book Store, 1984
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图书
19
由 Faill, Rodger T.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1977
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1977
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Government Document
图书