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L. Sabattier - Public Domain
Mathew Brady - Public Domain
ÑuÑuX - CC BY-SA 4.0
Public Domain
Josef Kriehuber (1800-1876); Foto Peter Geymayer - Public Domain
Slowking4 -
unknown -
unknown - Public Domain
NBC Television - Public Domain
Bain - Public Domain
Robinfox123 - CC BY-SA 3.0
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L. Sabattier - Public Domain
Meyer, Paul, 1840-1917
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Deming, Alison Hawthorne, 1946-....
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Burgersdijck, Franco (1590-1635).
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Mathew Brady - Public Domain
Simmons, James Fowler, 1795-1864
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Grey, John, 1785-1868
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ÑuÑuX - CC BY-SA 4.0
Dorticós Torrado, Osvaldo, 1919-1983
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Langford, Sam, 1883-1956
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Public Domain
Canton, Frank, 1849-1927
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Ricks, Thomas E.
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Willis, Nathaniel, 1780-1870
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Josef Kriehuber (1800-1876); Foto Peter Geymayer - Public Domain
Sainte-Aulaire, comte de (Louis Clair de Beaupoil), 1778-1854
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Marpurg, Friedrich Wilhelm, 1718-1795
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Slowking4 -
Arnold, Elizabeth, 1958-....
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Gerber, Ernst Ludwig, 1746-1819
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unknown -
Koffka, Kurt, 1886-1941
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unknown - Public Domain
Fisher, George J., -1960
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NBC Television - Public Domain
Brown, Cecil, 1907-1987
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Haraszthy, Agoston, 1812-1869
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Kaspi, Mati
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Woolson, Constance Fenimore, 1840-1894
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Bain - Public Domain
Townsend, Harry Everett
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Nalimov, V. V. (Vasiliĭ Vasilʹevich), 1910-1997
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Ward, Humphry, Mrs., 1851-1920
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unknown - Public Domain
Goclenius, Rudolph, 1572-1621
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Fly, James Lawrence, 1898-1966
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Thomson, Charles, 1729-1824
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unknown - Public Domain
Hubbard, Thomas H. (Thomas Hamlin), 1838-1915
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Perronet, Vincent, 1693-1785
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Robinfox123 - CC BY-SA 3.0
Fox, Robin, 1934-....
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unknown - Public Domain
Heinzen, Karl, 1809-1880