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1
by Richardson, G. B. (George Burr), 1872-1949
Washington : Govt. Print. Off., 1936
Washington : Govt. Print. Off., 1936
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2
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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3
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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4
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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5
6
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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7
by Stone, Ralph W. (Ralph Walter), 1876-1964
Washington : Govt. Print. Off., 1905
Washington : Govt. Print. Off., 1905
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8
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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9
by McCreath, Andrew S. (Andrew Smith), 1849-, Frazer, Persifor, 1844-1909, Platt, Franklin, 1844-1900, Lesley, J. P. (J. Peter), 1819-1903
Harrisburg : Published by the Board of Commissioners for the Second geological survey, 1879
Harrisburg : Published by the Board of Commissioners for the Second geological survey, 1879
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10
by Sloto, Ronald A.
Charleston, SC : [R.A. Sloto], 2016
Charleston, SC : [R.A. Sloto], 2016
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11
by O'Neill, Bernard J., 1920-
Harrisburg, Pa. : Pennsylvania. Bureau of Topographic and Geologic Survey, 1965
Harrisburg, Pa. : Pennsylvania. Bureau of Topographic and Geologic Survey, 1965
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12
by Phalen, W. C. (William Clifton), 1877-1949, Martin, Lawrence, 1880-1955
Washington : Govt. Print. Off., 1911
Washington : Govt. Print. Off., 1911
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13
by Woolsey, Lester Hood, 1877-1961
Washington : Govt. Print. Off., 1906
Washington : Govt. Print. Off., 1906
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14
by Faill, Rodger T.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1989
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1989
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15
by Glass, Gary B.
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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16
by Root, Samuel I.
Harrisburg : Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey, 1978
Harrisburg : Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey, 1978
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17
by Hoskins, Donald M.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1976
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1976
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18
by Wells, Richard B.
Harrisburg : Bureau of Topographic and Geologic Survey, 1980
Harrisburg : Bureau of Topographic and Geologic Survey, 1980
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19
by Sevon, William D.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1978
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1978
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20
by Inners, Jon D.
Harrisburg : Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey, 1978
Harrisburg : Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey, 1978
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