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B. Baldwin - Public Domain
From an unknown painting - Public Domain
w:fr:Charles Batteux - Public Domain
Foster Studio - Public Domain
Larabezo - CC BY-SA 4.0
United States Navy - Public Domain
unknown - Public Domain
Pierre-Marie Alix - Public Domain
http://1.bp.blogspot.com - Public Domain
UNH931 - CC BY-SA 4.0
USAF Airman; name unknown - Public Domain
Whoisjohngalt - CC BY-SA 3.0
Jim.henderson - CC0 1.0
Not identified - Public Domain
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Gronseth, Erik
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Frey-Wyssling, Albert
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B. Baldwin - Public Domain
Abbott, James, Sir, 1807-1896
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From an unknown painting - Public Domain
Creighton, William, 1778-1851
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Almagro, Diego de, -1538
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Nast, Minnie
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w:fr:Charles Batteux - Public Domain
Batteux, Charles, 1713-1780
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Foster Studio - Public Domain
Reynolds, J. Sargeant (Julian Sargeant), 1936-1971
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Larabezo - CC BY-SA 4.0
Pogorelich, Ivo, 1958-....
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United States Navy - Public Domain
Phelps, Thomas Stowell, 1822-1901
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unknown - Public Domain
Rosen, Roman Romanovich, Baron, 1847-1921
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Bates, Sidney, -1944
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Pierre-Marie Alix - Public Domain
Diderot, Denis, 1713-1784
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Herlihy, Ed
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Melba, Nellie
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http://1.bp.blogspot.com - Public Domain
Felkin, Robert
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UNH931 - CC BY-SA 4.0
Abramson, Seth, 1976-
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Kussmaul, Adolf, 1822-1902
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Mahurin, Walker M.
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Montagné, Gilbert
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Johnson, Lee, 1961-
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unknown - Public Domain
Garbisch, Edgar William
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USAF Airman; name unknown - Public Domain
Boyd, Albert, 1906-1976
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Spitz, Mark
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Whoisjohngalt - CC BY-SA 3.0
Ludtke, Melissa
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Horsfield, Thomas, 1773-1859
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Arnautoff, Victor Michail, 1896-1979
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Jim.henderson - CC0 1.0
Stephen Wise Free Synagogue (New York, N.Y.)
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Not identified - Public Domain
Drinkwater, John, 1762-1844
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Allgood, Sara 1879-1950