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J. J. Cade - Public Domain
Jahresbericht der Deutschen Mathematiker-Vereinigung 1915 - Public Domain
Jo Mora - Public Domain
CBS Television - Public Domain
Romina Espinosa - CC BY-SA 3.0
Alfred Stieglitz - Public Domain
unknown - Public Domain
Georges Biard - CC BY-SA 3.0
Smithsonian Institution -
Fotograaf Onbekend / Anefo - CC BY-SA 3.0
USHMM, courtesy of Hedwig Wachenheimer Epstein - Public Domain
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SentoDude - CC BY-SA 3.0
Rob Bogaerts / Anefo -
user at project - CC BY 2.5
Congressional Pictorial Directory - Public Domain
John Smart - Public Domain
Anonymous - Public Domain
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J. J. Cade - Public Domain
Spooner, John C. (John Coit), 1843-1919
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Jahresbericht der Deutschen Mathematiker-Vereinigung 1915 - Public Domain
Burkhardt, Heinrich, 1861-1914
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Jo Mora - Public Domain
Burbank, E. A. (Elbridge Ayer), 1858-1949
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CBS Television - Public Domain
Drivas, Robert, 1938-
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Romina Espinosa - CC BY-SA 3.0
Lovitz, Jon
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Alfred Stieglitz - Public Domain
Rhoades, Katharine N., 1885-1965
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Brooks, Aaron, 1976-
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Barbieri, Francisco Asenjo, 1823-1894
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Taitu, Empress, consort of Menelik II, Negus of Ethiopia, -1918
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Quirino, Carlos.
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unknown - Public Domain
Minto, John, 1822-1915
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Georges Biard - CC BY-SA 3.0
Binoche, Juliette, 1964-....
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Smithsonian Institution -
Rabel, Gabriele
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Fotograaf Onbekend / Anefo - CC BY-SA 3.0
MacLeish, Roderick, 1926-2006
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USHMM, courtesy of Hedwig Wachenheimer Epstein - Public Domain
Brandt, Rudolf, 1909-1948
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Mimieux, Yvette
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Bannerman, David Armitage, 1886-1979
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unknown - Public Domain
Gorham, William R., 1888-1949
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U.S. Government Printing Office - Public Domain
Rees, Edward H. (Edward Herbert), 1886-1969
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SentoDude - CC BY-SA 3.0
Lee, Jeanette
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Rob Bogaerts / Anefo -
Lucebert, 1924-1994
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Stimson, Lewis Atterbury, 1844-1917
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McKenzie, Benjamin, 1978-
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user at project - CC BY 2.5
Lee, Francis, 1944 November 13-
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Congressional Pictorial Directory - Public Domain
Bateman, Herbert H. (Herbert Harvell)
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Palucca, Gret, 1902-1993
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Fuller, Charles E. (Charles Eugene), 1849-1926
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John Smart - Public Domain
Clinton, Henry, Sir, 1738?-1795
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Anonymous - Public Domain
Christy, Edwin Pearce, 1815-1862
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Pocock, George, Sir, 1706-1792