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unknown - Public Domain
Robin & Lucienne Day Foundation - CC BY-SA 4.0
Photographer unidentified - Public Domain
Public Domain
David Doucet - Reversus.fr - CC BY-SA 3.0
Smithsonian Institution -
Photographer not named. - Public Domain
Gage Skidmore - CC BY-SA 3.0
Photographer unidentified. Retouched by TimofKingsland - Public Domain
Italian government - Public Domain
unknown - CC BY-SA 4.0
DoD photo by Oscar Porter, U.S. Army. - Public Domain
Oaktree b -
Rditucci - CC BY 3.0
Universal - Public Domain
FFVO - Public Domain
(U.S. Air Force Photo/Mike Kaplan) - Public Domain
Image from Wikimedia Commons
unknown - Public Domain
Li, Lisan, 1899-1967
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Robin & Lucienne Day Foundation - CC BY-SA 4.0
Day, Robin, 1915-2010
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Gregory, Donald, -1836
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Pins, Jacob, 1917-
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Photographer unidentified - Public Domain
Clemmer, Mary, 1839-1884
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Public Domain
Oury, Mr. (Granville Henderson), 1825-1891
Image from Wikimedia Commons
David Doucet - Reversus.fr - CC BY-SA 3.0
Juquin, Pierre
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Very, Jones, 1813-1880
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Smithsonian Institution -
Mather, Kirtley F. (Kirtley Fletcher), 1888-1978
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Witton, George
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Ṣadr, Mūsá
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Wain, Louis, 1860-1939
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Photographer not named. - Public Domain
Wisting, Oskar Adolf, 1871-1936
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Walden, John Morgan, 1831-1914
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Gage Skidmore - CC BY-SA 3.0
Campbell, Bruce, 1958-....
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Public Domain
National Library of Medicine (U.S.)
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Thorndike, Russell, 1885-1972
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Photographer unidentified. Retouched by TimofKingsland - Public Domain
Hillary, Edmund, 1919-2008
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Italian government - Public Domain
Roatta, Mario, 1887-
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Dale, Alan, 1947-
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unknown - CC BY-SA 4.0
Berne, Eric
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DoD photo by Oscar Porter, U.S. Army. - Public Domain
McNamara, Robert S., 1916-2009
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Oaktree b -
Stone, W. Clement, 1902-2002
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Rditucci - CC BY 3.0
King, Don, 1931-...
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Universal - Public Domain
Fox, Sidney, 1911-1942
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FFVO - Public Domain
Rosse, Herman, 1887-1965
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Comenius, Johann Amós, 1592-1670
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unknown - Public Domain
Pepper, William, 1843-1898
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(U.S. Air Force Photo/Mike Kaplan) - Public Domain
Bowden, Mark, 1951-....
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Cartier, Jacques, 1491-1557