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David West -
unknown - Public Domain
Tduk - CC BY-SA 4.0
Alia 2005 - CC BY-SA 3.0
Autumnb19 - CC BY-SA 4.0
Joella Marano - CC BY-SA 2.0
Cliff - CC BY 2.0
Thomas Edgar Stephens - Public Domain
anonymous -
Photo credit: International<br />Published in ''Time'' Magazine - Public Domain
Juan de Courbes-Biblioteca Nacional de España - CC BY-SA 4.0
Public Domain
Elenagiussani - CC BY-SA 3.0
Ailura - CC BY-SA 3.0
US Government Printing Office (Washington, DC), publisher. - Public Domain
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Taft, Kingsley A. (Kingsley Arter), 1903-1970
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Roselius, Christian, 1803-1873
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David West -
Richardson, Dorothy M. (Dorothy Miller), 1873-1957
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Alper, Murray, 1904-1984
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unknown - Public Domain
Lwoff, André 1902-
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Tduk - CC BY-SA 4.0
Tuten, Frederic
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Alia 2005 - CC BY-SA 3.0
Buchholz, Horst, 1933-2003
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Mackenzie, Morell, 1837-1892
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Autumnb19 - CC BY-SA 4.0
Assunção, Leilah
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Joella Marano - CC BY-SA 2.0
Cook, Barbara
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Cliff - CC BY 2.0
Harris, Franco, 1950-
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Thomas Edgar Stephens - Public Domain
Stevens, Robert T. (Robert Ten Broeck), 1899-1983
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Foraker, Joseph Benson, 1846-1917
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anonymous -
Katterfelto, Gustavus, -1799
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Photo credit: International<br />Published in ''Time'' Magazine - Public Domain
Sinclair, Upton, 1878-1968
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Juan de Courbes-Biblioteca Nacional de España - CC BY-SA 4.0
Carvajal y Mendoza, Luisa de 1566-1614
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Public Domain
Caner, Ergun Mehmet
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Smallwell, Edward, 1720 or 1721-1799
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Elenagiussani - CC BY-SA 3.0
Nicoletti, Manfredi, 1930-....
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Emerson, P. H. (Peter Henry), 1856-1936
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McDonald, Allan, 1859-1905
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Traube, Ludwig, 1861-1907
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Ailura - CC BY-SA 3.0
Suárez, Luis, 1987-
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Burdett, Samuel S. (Samuel Swinfin), 1836-1914
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Langford, Frances
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Ure, Andrew, 1778-1857
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Lang, June, 1917-2005
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US Government Printing Office (Washington, DC), publisher. - Public Domain
Byron, William Devereaux, 1895-1941
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Jessup, Henry Harris, 1832-1910
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anonymous -
Beneš, Vojta, 1878-1951