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9by Gatschet, Albert S. (Albert Samuel), 1832-1907.“...[Philadelphia...”
Published 1885
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14by Greene, F. B.“...Philadelphia : Geographical Society of Philadelphia...”
Published 1904
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15by LeConte, John L.“...Philadelphia,Academy of Natural Sciences of Philadelphia...”
Published 1860
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16by Bryant, Henry G. (Henry Grier), 1859-1932, Chamberlin, Thomas C. (Thomas Chrowder), 1843-1928, Ohlin, Axel Gabriel, 1867-“...Philadelphia :[The Geological Club of Philadelphia],1895....”
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17Published 1891“...Philadelphia,Academy of Natural Sciences of Philadelphia...”
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18by Bryant, Henry G. (Henry Grier), 1859-1932, Chamberlin, Thomas C. (Thomas Chrowder), 1843-1928, Ohlin, Axel Gabriel, 1867-“...Philadelphia :[The Geological Club of Philadelphia],1895....”
Published 1895
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19by Fox, W J“...Philadelphia,Academy of Natural Sciences of Philadelphia...”
Published 1892
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20Published 1901“...Philadelphia,Academy of Natural Sciences of Philadelphia...”
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