Author
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Buffon, Georges Louis Leclerc, comte de, 1707-1788
2
Canada. Department of Citizenship and Immigration. Economic and Social Research Division
2
Case, Shirley Jackson, 1872-1947
2
Clemson, Thomas Green, 1807-1888
2
Cline, Garner J.
2
Coal Run Improvement and Rail Road Company
2
Cope, John Hautenville
2
Darlington, William, 1782-1863
2
Darrow, Clarence, 1857-1938
2
Davis, W. W. H. 1820-1910
2
Delaware Academy of Natural Science
2
Delaware County Institute of Science (Media, Pa.)
2
Des Moulins, Charles, 1797 or 1798-1875
2
Dieck, Hermann
2
Ditchfield, P. H. 1854-1930
2
Doubleday, H. Arthur
2
Ennis, Jacob
2
Erie Society for Genealogical Research
2
Ewan, Joseph, 1909-1999
2
Fettke, Charles R. 1888-1959
2
Foreign Language Information Service
2
Formigli, Donald
2
Forster, Johann Reinhold, 1729-1798
2
Gavit, John Palmer, 1868-1954
2
Geijerstam, Karl Johan af, 1860-1899
2
Gettysburg College Philomathean Society
2
Girard, Charles, 1822-1895
2
Guer, Jean-Antoine, 1713-1764,
2
Haldeman, Samuel Stehman, 1812-1880
2
Historical Society of Pennsylvania
2
Iscrupe, William L.
2
Jergens, Eugene J.
2
Knoop, Douglas, 1883-
2
Leggett, Nancy G.
2
Lewis, Tayler, 1802-1877
2
Library Company of Philadelphia
2
Lilja, Nils, 1808-1870
2
Linné, Carl von, 1707-1778
2
Lisovyĭ, I︠U︡riĭ
2
Maillet, Benoît de, 1656-1738
2
Malden, Henry Elliot
2
Mease, James, 1771-1846
2
Melʹnyk, Andriĭ, 1888-1967
2
Merritt, J. King 1824-1882
2
Metropolitan Life Insurance Company
2
Morris, John G. 1803-1895
2
Morse, Samuel Finley Breese, 1791-1872
2
Natural Lands Trust
2
Neagles, James C.
2
New Granada Mineral Land Company
2
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