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unknown - Public Domain
Lin Shu - CC0 1.0
Maler unbekannt - Public Domain
United States Senate Historical Office - Public Domain
Luca Borghi - CC BY-SA 4.0
Carl Van Vechten - Public Domain
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Camomila - CC BY-SA 3.0
The U.S. National Archives -
'arcticpenguin' - CC BY 2.0
Francois Theodore Rochard (1798-1858) - Public Domain
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Burgess, John Bagnold (English painter, 1830-1897)
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Arbore, Z. C. (Zamfir C.), 1848-1933
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unknown - Public Domain
Battey, Robert, 1828-1895
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Cleaver, Euseby, 1746-1818
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Lin Shu - CC0 1.0
Lin, Shu, 1852-1924
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Maler unbekannt - Public Domain
Voltz, Friedrich, 1817-1886
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Harrold, Thomas L. (Thomas Leonard), 1902-1973
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United States Senate Historical Office - Public Domain
Griswold, Dwight P. (Dwight Palmer), 1893-1954
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Pelham, Henry, 1695?-1754
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Arthur, Jean, 1900-1991
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Blomstedt, Pauli Ernesti, 1900-1935
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Luca Borghi - CC BY-SA 4.0
Baccelli, Guido, 1832-1916
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Carl Van Vechten - Public Domain
Taylor, Deems, 1885-1966
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Calamy, Edmund, 1671-1732
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unknown - Public Domain
Moholy-Nagy, László, 1895-1946
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Maxcy, Virgil, 1785-1844
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Charisse, Cyd
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Voisenon, Claude-Henri de Fusée de, 1708-1775
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Scharwenka, Xaver, 1850-1924
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Dinesen, Thomas, 1892-1979
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Dubos, René J. (René Jules), 1901-1982
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Cockburn, Henry Cockburn, Lord, 1779-1854
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Camomila - CC BY-SA 3.0
Margotton, René 1915-2009
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Holling, C.S.
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Lachman, Edward, 1948-....
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The U.S. National Archives -
McCall, Tom, 1913-1983
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Bulganin, Nikolay Aleksandrovich, 1895-1975
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'arcticpenguin' - CC BY 2.0
Lewis, Harry R.
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Reid, D. B. (David Boswell), 1805-1863
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Francois Theodore Rochard (1798-1858) - Public Domain
Severne, John Edmund, 1826-1899