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unknown - Public Domain
unknown photographer - Public Domain
Daniel Raskin - CC BY 2.5
nicolas genin - CC BY-SA 2.0
Contemporary photograph - Public Domain
w:Miller Center of Public Affairs - CC BY 2.0
Atelier Nadar - Public Domain
NBC - Public Domain
Félix Nadar - Public Domain
Dr. David LaBerge - CC BY-SA 3.0
Thelmadatter - CC BY-SA 3.0
François Clouet - Public Domain
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unknown - Public Domain
Thompson, Sheldon, 1785-1851
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unknown photographer - Public Domain
Cowen, Benjamin Rush, 1831-1908
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unknown - Public Domain
Armstrong, Neil, 1930-2012
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Daniel Raskin - CC BY 2.5
Raskin, Jonah, 1942-...
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Wade, Bob, 1943-
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nicolas genin - CC BY-SA 2.0
Tsukamoto, Shinʼya, 1960-
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About, Edmond, 1828-1885
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Contemporary photograph - Public Domain
Frazer, James George, 1854-1941
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w:Miller Center of Public Affairs - CC BY 2.0
Simmons, Beth A., 1958-....
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Morgan, C. Lloyd (Conwy Lloyd), 1852-1936
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Hanson, Duane
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Atelier Nadar - Public Domain
Gondinet, Edmond, 1828-1888
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Chandler, Lane, 1899-1972
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Malvern, Gladys
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Bell, Alphonzo, 1914-2004
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NBC - Public Domain
Grassle, Karen, 1944-
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Dibelius, Otto, 1880-1967
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Huysum, Jan van 1682-1749
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Félix Nadar - Public Domain
Gautier, Théophile, 1811-1872
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Caldwell, Charles, 1772-1853
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Brisson, Henri, 1835-1912
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Ludlow, Fitz Hugh, 1836-1870
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Dr. David LaBerge - CC BY-SA 3.0
Laberge, David
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Thelmadatter - CC BY-SA 3.0
Belkin, Arnold
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Reiske, Johann Jacob, 1716-1774
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Heiden, Konrad, 1901-1966
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François Clouet - Public Domain
Montmorency, François de Montmorency, duc de, 1530-1579
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unknown - Public Domain
Lerdo de Tejada, Miguel, 1812-1861
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Schottky, Walter, 1886-1976
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Hind, J. Russell (John Russell), 1823-1895