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unknown -
unknown - Public Domain
C. Kurtz (Zeichner), Carl August Deis - Public Domain
Public Domain
Sailko - CC BY 3.0
Joseph Gaston - Public Domain
Rembrandt Peale - Public Domain
Photograph - Public Domain
Natascha Artin (original photo); Jochen Burghardt - CC BY-SA 2.0
Paul Hermans - CC BY-SA 3.0
unknown photographer - Public Domain
ABC Television - Public Domain
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unknown -
Hrdlička, Alěs 1869-1943
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unknown - Public Domain
Leavitt, Humphrey H. (Humphrey Howe), 1796-1873
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Carabin, Rupert, 1862-1932
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Jones, Marcus E. (Marcus Eugene), 1852-1934
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C. Kurtz (Zeichner), Carl August Deis - Public Domain
Kücken, Friedrich Wilhelm, 1810-1882
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Public Domain
Jesup, Morris K. (Morris Ketchum), 1830-1908
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Chevalier, William, 1804-1866
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Confucius
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Sailko - CC BY 3.0
Preciado de la Vega, Francisco, 1712-1789
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Luhan, Mabel Dodge, 1879-1962
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Wessel, Horst, 1907-1930
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Joseph Gaston - Public Domain
Skinner, Eugene F., 1809-1864
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Dyer, Elisha, 1811-1890
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Rembrandt Peale - Public Domain
Marbury, William, 1761 or 1762-1835
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Photograph - Public Domain
Peabody, Andrew P. (Andrew Preston), 1811-1893
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Gimson, Franklin Charles, 1890-1975
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unknown - Public Domain
Lamy, Bernard, 1640-1715
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Nicolai, Philipp, 1556-1608
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Natascha Artin (original photo); Jochen Burghardt - CC BY-SA 2.0
Weyl, F. Joachim (Fritz Joachim), 1915-
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Perkins, James Breck, 1847-1910
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Syme, James, 1799-1870
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Blue, Rupert Lee, 1868-1948
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unknown - Public Domain
Booy, Theodoor Hendrik Nikolaas de, 1882-1919
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Paul Hermans - CC BY-SA 3.0
Colette, Saint, 1381-1447
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unknown photographer - Public Domain
McMurrich, J. Playfair (James Playfair), 1859-1939
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Reibey, Mary, 1777-1855
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ABC Television - Public Domain
McKay, Gardner.
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Barlow, George Hilaro, 1762-1846
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Dahl, Chrix, 1906-
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Public Domain
Greer, David Hummell, 1844-1919.