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unknown -
BBR100 - CC BY-SA 4.0
Man2mars28 - CC BY-SA 4.0
Public Domain
Ugo Ponte onl - CC BY-SA 2.0
author unknown - Public Domain
US Government printing Office (Washington, DC), publisher. - Public Domain
anonymous - Public Domain
Photographer: John E. Reed, Hollywood - Public Domain
Andrew Dermont - CC BY 3.0
Brigham Young University - Public Domain
Fronteiras do Pensamento - CC BY-SA 2.0
Berthe - CC BY-SA 3.0
George M. Bergman, Berkeley -
not verifiable<br/> - Public Domain
Institution:Reial Acadèmia de Ciències i Arts de Barcelona - CC BY-SA 3.0
user at project - Public Domain
unknown - Public Domain
Image from Wikimedia Commons
unknown -
Petiot, Marcel, 1897-1946
Image from Wikimedia Commons
BBR100 - CC BY-SA 4.0
Zadeh, Lotfi A. (Lotfi Asker)
Image from Wikimedia Commons
Stanley, Francis Edgar, 1849-1918
Image from Wikimedia Commons
Man2mars28 - CC BY-SA 4.0
Kennedy, X.J.
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Public Domain
Bond, Frederick Bligh, 1864-1945
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Ugo Ponte onl - CC BY-SA 2.0
Casadesus, Jean-Claude, 1935-....
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Pangborn, Franklyn, 1889-1958
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author unknown - Public Domain
Bandera, Stepan, 1909-1959
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Lilburn, Douglas
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Ri︠a︡zanov, Ėlʹdar
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US Government printing Office (Washington, DC), publisher. - Public Domain
Dolliver, James I. (James Isaac), 1894-1978
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Tuke, James H. (James Hack), 1819-1896
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anonymous - Public Domain
Schenk von Stauffenberg, Klaus Philipp, Graf, 1907-1944
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Reynolds, Joseph Jones, 1822-1899
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Photographer: John E. Reed, Hollywood - Public Domain
Darwell, Jane, 1880-1967
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Andrew Dermont - CC BY 3.0
Wolff, Michael, 1953-....
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Brigham Young University - Public Domain
Jensen, Christen, 1881-1961
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Manin, Daniele, 1804-1857
Image from Wikimedia Commons
Fronteiras do Pensamento - CC BY-SA 2.0
Paglia, Camille, 1947-....
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Berthe - CC BY-SA 3.0
Wong, Manfred 1957-....
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George M. Bergman, Berkeley -
Kaplansky, Irving, 1917-2006
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not verifiable<br/> - Public Domain
Jaekel, Otto
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Institution:Reial Acadèmia de Ciències i Arts de Barcelona - CC BY-SA 3.0
Domènech Estapà, Josep 1858-1917
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user at project - Public Domain
Gruber, Ruth, 1911-
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unknown - Public Domain
Puckett, Riley, 1894-1946
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Lemordant, Jean Julien 1882-1968
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Hare, Darius Dodge, 1843-1897
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Mannerheim, Carl Gustaf Emil, 1867-1951
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Martini, Simone, 1283-1344
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Federico II Gonzaga, Duke of Mantua, 1500-1540