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1
by Barnes, John Henry, 1946-
Harrisburg, Pa. : Pennsylvania. Bureau of Topographic and Geologic Survey, 2004
Harrisburg, Pa. : Pennsylvania. Bureau of Topographic and Geologic Survey, 2004
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2
by Richardson, G. B. (George Burr), 1872-1949
Washington : Govt. Print. Off., 1936
Washington : Govt. Print. Off., 1936
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3
by Leighton, Henry, 1884-
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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4
by 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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5
by 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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6
by Wagner, Holly C. (Holly Clyde), 1918-2005
Washington [D.C.] : G.P.O., 1953
Washington [D.C.] : G.P.O., 1953
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7
by Innes, John D.
Harrisburg : Pennsylvania Geological Survey, 1997
Harrisburg : Pennsylvania Geological Survey, 1997
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Book
8
by Leaf, C Gordon
[Harrisburg] : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topgraphic and Geologic Survey; [Washington for sale by Supt. of Docs., U.S. Govt. Print. Off.], 1971
[Harrisburg] : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topgraphic and Geologic Survey; [Washington for sale by Supt. of Docs., U.S. Govt. Print. Off.], 1971
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9
by Prosser, L. J. (Leonard J.)
[Harrisburg, Pa.] : Bureau of Topographic and Geologic Survey, 1986
[Harrisburg, Pa.] : Bureau of Topographic and Geologic Survey, 1986
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10
by Jones, Anna Isabel, 1881-
Harrisburg : Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey, 1969; 1926
Harrisburg : Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey, 1969; 1926
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11
12
by Prosser, L. J. (Leonard J.)
[Harrisburg] : Bureau of Topographic and Geologic Survey, 1985
[Harrisburg] : Bureau of Topographic and Geologic Survey, 1985
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13
14
by Shaffner, Marchant N. (Marchant Nissley), 1897-
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1951
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1951
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15
by Stone, Ralph W. (Ralph Walter), 1876-1964
Washington : Govt. Print. Off., 1905
Washington : Govt. Print. Off., 1905
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16
17
by Stose, George Willis, 1869-1960
Harrisburg, Pa. : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1973
Harrisburg, Pa. : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1973
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18
19
by Hawkes, H. E. (Herbert Edwin), 1912-1996
Washington [D.C.] : G.P.O., 1953
Washington [D.C.] : G.P.O., 1953
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20
by Stone, Ralph W. (Ralph Walter), 1876-1964
Harrisburg, Pa. : Dept. of Internal Affairs, Topographic and Geologic Survey, 1940
Harrisburg, Pa. : Dept. of Internal Affairs, Topographic and Geologic Survey, 1940
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