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Hartley Webster - Public Domain
National Photo Company Collection. - Public Domain
unknown - Public Domain
Ethiopian Air Force - Public Domain
U.S. Naval Historical Center Photograph - Collection of Vice Admiral Dixwell Ketcham. - Public Domain
Dictioneer - CC BY-SA 4.0
Waldon Fawcett - Public Domain
unknown photographer - CC BY-SA 3.0
Jan Vilímek - Public Domain
Smithsonian Institution -
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Hartley Webster - Public Domain
Von Tempsky, G. F. (Gustavus Ferdinand), 1828-1868
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Witherspoon, Reese, 1976-....
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Albini, Franco
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Reichenbach, H.G. (Heinrich Gustav), 1824-1889
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Jurieu, Pierre, 1637-1713
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Barbeau, Marius, 1883-1969
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National Photo Company Collection. - Public Domain
Hamilton, Nancy, 1908-1985
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unknown - Public Domain
Hecker, Friedrich, 1811-1881
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Ethiopian Air Force - Public Domain
Robinson, John Charles, 1903-1954
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U.S. Naval Historical Center Photograph - Collection of Vice Admiral Dixwell Ketcham. - Public Domain
Bogan, Gerald F. (Gerald Francis), 1894-1973
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Stewart, Balfour, 1828-1887
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Castelvetro, Giacomo, 1546-1616?
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Dictioneer - CC BY-SA 4.0
Kaprow, Allan
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Schleicher, Kurt von 1882-1934
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Royer-Collard, Pierre-Paul, 1763-1845
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Waldon Fawcett - Public Domain
Chanute, Octave, 1832-1910
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Marx, Zeppo, 1901-1979
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Babenco, Hector
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unknown - Public Domain
Hoogstraal, Harry, 1917-1986
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Councill, W. H. (William Hooper), 1848-
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Howard, John G. (John George), 1803-1890
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unknown photographer - CC BY-SA 3.0
Fougner-Lundh, Gr. (Gregers), 1786-1836
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Jan Vilímek - Public Domain
Weis, Karel, 1862-1944
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unknown - Public Domain
Komitas, Vardapet, 1869-1935
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Kellar, Harry, 1849-1922
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Avery, Mary Ellen, 1927-2011
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Stanford, Thomas C., 1865-1946
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Smithsonian Institution -
Bohm, Max, 1868-1923
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Moore, Bloomfield H., Mrs., 1824-1899
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Burnett, Edward, 1849-1925