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H. W. Beckwith - Public Domain
Spencer DeSanto, Graduate Student - Public Domain
Mathew Brady's studio -
NIH - CC0 1.0
unknown - Public Domain
user at project - Public Domain
99of9 - CC BY-SA 3.0
US Air Force - Public Domain
Pavel.mavrin - Public Domain
Bain - Public Domain
Georges Biard - CC BY-SA 3.0
Alan Light - CC BY 2.0
Mathew Brady Levin Corot Handy - Public Domain
Chris Samuel - CC BY 2.0
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H. W. Beckwith - Public Domain
Yates, Richard, 1860-1936
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Rich, Penelope, Lady, 1562?-1607
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Scarlett, James Yorke, Sir, 1799-1871
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Spencer DeSanto, Graduate Student - Public Domain
Chiao, Raymond Y.
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Moore, Julianne
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Mathew Brady's studio -
Cranch, William, 1769-1855
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NIH - CC0 1.0
Kouwenhoven, W. B. (William Bennett), 1886-1975
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unknown - Public Domain
Hermann, Binger, 1843-1926
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user at project - Public Domain
Top, Edward
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99of9 - CC BY-SA 3.0
Mitchell, David Scott, 1836-1907
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Mahaney, C. J.
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Wentworth, John, 1671-1730
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US Air Force - Public Domain
Jackson, James F.
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Respighi, Lorenzo, 1824-1889
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Oginski, Michel, 1765-1833
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Pavel.mavrin - Public Domain
Hopcroft, John E., 1939-
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Knight, Laura, | Dame, 1877-1970
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Bain - Public Domain
Fish, Frederick P. (Frederick Perry), 1855-1930
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Georges Biard - CC BY-SA 3.0
Cowl, Darry, 1925-
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Powell, Cecil Frank
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Alan Light - CC BY 2.0
Henderson, Florence
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Webb, DeWitt, 1839 or 1840-1917
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Finn, Neil, 1958-
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Mathew Brady Levin Corot Handy - Public Domain
McDill, James Wilson, 1834-1894
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Durkheim, Émile, 1858-1917
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Poltorat︠s︡kiĭ, Sergeĭ Dmitrievich 1803-1884
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Chris Samuel - CC BY 2.0
Williams, Donna, 1963-....
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Williams, Clifton C., 1932-1967
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Tong, William, 1662-1727
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Cairo, Francesco, 1607-1665