Suggested Topics within your search.
Suggested Topics within your search.
1
by 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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by Stevenson, John J. (John James), 1841-1924
Harrisburg [Pa.] : Pub. by the Board of Commissioners for the Second Geological Survey, 1877
Harrisburg [Pa.] : Pub. by the Board of Commissioners for the Second Geological Survey, 1877
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4
5
by Stevenson, John J. (John James), 1841-1924
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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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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8
by D'Invilliers, E. V. (Edward Vincent), 1857-1928
Harrisburg [Pa.] : Pub. by the board of commissioners for the Second geological survey, 1891
Harrisburg [Pa.] : Pub. by the board of commissioners for the Second geological survey, 1891
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9
by Platt, Franklin, 1844-1900
Harrisburg [Pa.] : Published by the Board of Commissioners for the Second Geological Survey, 1877
Harrisburg [Pa.] : Published by the Board of Commissioners for the Second Geological Survey, 1877
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10
by Sherwood, Andrew, 1848-1933
Harrisburg [Pa.] : Pub. by the Board of Commissioners for the Second Geological Survey, 1880
Harrisburg [Pa.] : Pub. by the Board of Commissioners for the Second Geological Survey, 1880
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11
by Hall, Charles Edward, 1852-1908
Harrisburg [Pa.] : Pub. by the Board of Commissioners for the Second geological survey, 1878
Harrisburg [Pa.] : Pub. by the Board of Commissioners for the Second geological survey, 1878
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13
by Lehman, Ambrose E. (Ambrose Edwin), 1851-1917
[Harrisburg, Pa.] : Geological Survey of Pennsylvania, 1875
[Harrisburg, Pa.] : Geological Survey of Pennsylvania, 1875
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14
by Platt, Franklin, 1844-1900
Harrisburg [Pa.] : Published by the Board of Commissioners for the Second Geological Survey, 1877
Harrisburg [Pa.] : Published by the Board of Commissioners for the Second Geological Survey, 1877
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15
by Lesley, J. P. (J. Peter), 1819-1903
[Philadelphia, Pa] : Wm. A. Ingham, 1893
[Philadelphia, Pa] : Wm. A. Ingham, 1893
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16
by Hall, Charles Edward, 1852-1908
Harrisburg [Pa.] : Pub. by the Board of Commissioners for the Second Geological Survey, 1885
Harrisburg [Pa.] : Pub. by the Board of Commissioners for the Second Geological Survey, 1885
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