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NASA - Public Domain
Vinayaraj - CC BY-SA 3.0
United States Air Force - Public Domain
Rlarrett - CC BY-SA 3.0
Unknown or not provided - Public Domain
Orest Kiprensky -
J. Cochran - Public Domain
Wisc - Public Domain
Enfo - CC BY-SA 3.0
Josef Kriehuber - Public Domain
unknown - Public Domain
Original uploader was :it:FLEGMA - Public Domain
Associated Students, University of California, Los Angeles - Public Domain
Ludwig Gutmann - Public Domain
George Dawe -
:en:United States Court of Appeals for the Ninth Circuit - Public Domain
anonymous - Public Domain
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Burchard, Horatio C. (Horatio Chapin), 1825-1908
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NASA - Public Domain
Ceruzzi, Paul E.
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Dostoyevsky, Fyodor, 1821-1881
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Vinayaraj - CC BY-SA 3.0
Gadgil, Madhav.
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United States Air Force - Public Domain
Welch, George, 1918-1954
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Franklin, Isaac, 1789-1846
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Rlarrett - CC BY-SA 3.0
Robbins, Trina, 1938-
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Unknown or not provided - Public Domain
Deng, Xiaoping, 1904-1997
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Orest Kiprensky -
Golovnin, Vasiliĭ Mikhaĭlovich, 1776-1831
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McCain, Robert Stacy
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Mercouri, Melina, 1925-
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Rosenthal, Toby Edward, approximately 1848-1917
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Keller, Albert von 1844-1920
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J. Cochran - Public Domain
Cooper, Thomas, 1805-1892
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Wisc - Public Domain
Brinkmann, Rolf-Dieter
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Enfo - CC BY-SA 3.0
Capmany y de Montpalau, Antonio de 1742-1813
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Symington, William, 1764-1831
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Josef Kriehuber - Public Domain
Gyrowetz, Adalbert
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Bahr, Hermann, 1863-1934
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unknown - Public Domain
Müller, Paul Hermann, 1899-1965
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Connolly, Walter, 1887-1940
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Leslie, Gladys, 1899-1976
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Original uploader was :it:FLEGMA - Public Domain
Spiegel, Adriaan van de 1578-1625
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Schaechter, Mordkhe, 1927-2007
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Associated Students, University of California, Los Angeles - Public Domain
Cressey, Donald R. (Donald Ray), 1919-1987
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Ludwig Gutmann - Public Domain
Bergler, Edmund, 1899-1962
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George Dawe -
Alava, Miguel De
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:en:United States Court of Appeals for the Ninth Circuit - Public Domain
Bernal, Jesus G., 1963-
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Ace, Goodman
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anonymous - Public Domain
Blanchard, Amy Ella, 1856-1926