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unknown - Public Domain
Unattributed - Public Domain
Dean, engraver, after a painting by E. Westoby - Public Domain
US Embassy Canada - CC BY 2.0
Photo owned by Langham Partnership International (http://langhampartnership.org/). - CC BY 3.0
Chicago Press Club - Public Domain
Wpcpey - CC BY 3.0
*:File:Wes_Jackson_and_Jane_Fonda.jpg - CC BY 2.0
National Photo Company. Photographer unknown. - Public Domain
Smileysavvsss - CC BY-SA 4.0
Jay Godwin - Public Domain
United States Navy - Public Domain
No photographer credited - Public Domain
Köhler - Public Domain
Jo Mora - Public Domain
:en:John Thomas Scharf - Public Domain
film screenshot - Public Domain
Heinrich Riedel - Public Domain
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unknown - Public Domain
Benson, Ezra T. (Ezra Taft), 1811-1869
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Unattributed - Public Domain
Fugère, Lucien 1848-1935
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Dean, engraver, after a painting by E. Westoby - Public Domain
Murray, Lindley, 1745-1826
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Desmarest, Nicolas, 1725-1815
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US Embassy Canada - CC BY 2.0
Good, Bill
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Photo owned by Langham Partnership International (http://langhampartnership.org/). - CC BY 3.0
Stott, John R. W.
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Berhanyer, Elio
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Aldrich, Richard Steere, 1884-1941
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Li, Shangyin, 813-858
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Chicago Press Club - Public Domain
McCormick, Harold F. Harold Fowler 1872-1941
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Kukolʹnik, N. (Nestor), 1809-1868
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Wpcpey - CC BY 3.0
Mai, Jia, 1944 February 29-
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Miller, Tom, 1947-....
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unknown - Public Domain
Vega, Jorge de la 1930-1971
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*:File:Wes_Jackson_and_Jane_Fonda.jpg - CC BY 2.0
Jackson, Wes
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National Photo Company. Photographer unknown. - Public Domain
Cobb, Ty, 1886-1961
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unknown - Public Domain
Goddard, Arabella, 1836-1922
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Clawson, Isaiah Dunn, 1822-1879
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Smileysavvsss - CC BY-SA 4.0
Gee, Maggie, 1923-2013
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Jay Godwin - Public Domain
Oshinsky, David M., 1944-....
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United States Navy - Public Domain
Reid, Samuel Chester, 1783-1861
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No photographer credited - Public Domain
Willis, Frances Elizabeth, 1899-1983
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Köhler - Public Domain
Köhler, Ernesto, 1849-1907
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Thacher, John Boyd, 1847-1909
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Kielland, Alexander Lange, 1849-1906
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Leese, Jacob P. (Jacob Primer), 1809-1892
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Jo Mora - Public Domain
Burbank, E. A. (Elbridge Ayer), 1858-1949
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:en:John Thomas Scharf - Public Domain
Sellers, William, 1824-1905
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film screenshot - Public Domain
Edwards, James, 1918 March 6-1970
Image from Wikimedia Commons
Heinrich Riedel - Public Domain
Loorits, Oskar, 1900-