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1
by Cathcart, S. H. (Stanley Holman), 1889-
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geological Survey, 1934
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geological Survey, 1934
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Book
2
3
by Edmunds, William E.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1968
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1968
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4
by Reese, John F.
[Harrisburg] : Bureau of Topographic and Geological Survey, 1922
[Harrisburg] : Bureau of Topographic and Geological Survey, 1922
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Book
5
by Dodge, Clifford H.
[Harrisburg] : Pennsylvania Geological Survey, 2005
[Harrisburg] : Pennsylvania Geological Survey, 2005
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6
7
by Lytle, William S.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1957
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1957
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Book
8
by Lytle, William S.
[Harrisburg, Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1961
[Harrisburg, Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1961
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9
10
by Lytle, William S., Heyman, Louis
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1972
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1972
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11
by Fettke, Charles R. (Charles Reinhard), 1888-1959
[Harrisburg, Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1954
[Harrisburg, Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1954
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12
by Fettke, Charles R. (Charles Reinhard), 1888-1959
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1956
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1956
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Book
13
by Lytle, William S.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1960
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1960
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14
by Kelley, Dana R.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1969
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1969
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15
by Lytle, William S.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1966
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1966
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16
by Lytle, William S.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1967
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1967
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17
by Lytle, William S., Piotrowski, Robert G., Heyman, Louis
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1976
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1976
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18
by Bolger, Robert C. (Robert Courtney)
[Harrisburg, Pa.] : Pennsylvania, Bureau of Topographic and Geological Survey, 1953
[Harrisburg, Pa.] : Pennsylvania, Bureau of Topographic and Geological Survey, 1953
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19
by Edmunds, William E.
Harrisburg [Pa.] : Pennsylvania. Bureau of Topographic and Geologic Survey, 1969
Harrisburg [Pa.] : Pennsylvania. Bureau of Topographic and Geologic Survey, 1969
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