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Mr. Tickle - CC BY-SA 3.0
George Grantham Bain Collection (Library of Congress) - Public Domain
Unknown military photographer - Public Domain
unknown - Public Domain
The National Archives UK -
Will Pittenger - CC BY-SA 3.0
Gmgjrilum - CC BY-SA 3.0
jonathandewe - CC BY-SA 2.0
Thomas Pennant - Public Domain
Author died more than 70 years ago - Public Domain
Arturo Espinosa - CC BY 2.0
אדם גרנט - CC BY-SA 3.0
Contemporary portrait - Public Domain
Pierre Daret - Public Domain
(extracted by:) Jochen Burghardt -
Merchants Portrait Co., London - Public Domain
Reginald Haines (1872-1941) - Public Domain
James A. Roberts - Public Domain
Image from Wikimedia Commons
Mr. Tickle - CC BY-SA 3.0
Gibson, Ian, 1939-
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Lunacharsky, Anatoly Vasilievich, 1875-1933
Image from Wikimedia Commons
George Grantham Bain Collection (Library of Congress) - Public Domain
Ward, Wilfrid, 1856-1916
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Unknown military photographer - Public Domain
Cole, William E. (William Edward), 1874-1953
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Haxthausen, August, Freiherr von, 1792-1866
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unknown - Public Domain
Durand, Guillaume, approximately 1230-1296
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The National Archives UK -
Sharpe, Alfred, 1853-1935
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Will Pittenger - CC BY-SA 3.0
Mote Marine Laboratory (Sarasota, Fla.)
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Marx, Wilhelm, 1863-1946
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Gmgjrilum - CC BY-SA 3.0
Foster, Hugh F., 1918-2004
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Northesk, William Carnegie, Earl of, 1758-1831
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jonathandewe - CC BY-SA 2.0
Huang, Yasheng.
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Thomas Pennant - Public Domain
Williams, John, 1582-1650
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Kelly, Patsy, 1910-1981
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Author died more than 70 years ago - Public Domain
Sage, Rufus B., 1817-1893
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Arturo Espinosa - CC BY 2.0
Fromm, Erich, 1900-1980
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Anderson, William, 1842-1900
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אדם גרנט - CC BY-SA 3.0
Grant, Adam M.
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Zaharias, Babe Didrikson, 1911-1956
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Contemporary portrait - Public Domain
Tucker, Henry St. George, 1874-1959
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Lofgren, Nils
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Pierre Daret - Public Domain
Montbazon, Hercule de Rohan, duc de, 1568-1654
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(extracted by:) Jochen Burghardt -
Lark-Horovitz, K. (Karl), 1892-1958
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Merchants Portrait Co., London - Public Domain
Neilans, Alison, 1884-1942
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unknown - Public Domain
Smith, Addison T. (Addison Taylor), 1862-1956
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unknown - Public Domain
Barton, R. T. (Robert Thomas), 1842-1917
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Reginald Haines (1872-1941) - Public Domain
Horne, C. Silvester (Charles Silvester), 1865-1914
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Crémieux, Hector Jonathan, 1828-1892
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James A. Roberts - Public Domain
Olcott, Frederic P., 1841-1909
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unknown - Public Domain
Patten, Edward J. (Edward James), 1905-1994