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Georges Seguin (Okki - CC BY-SA 3.0
Cdebary - CC BY-SA 4.0
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unknown - Public Domain
Mathew Brady - Public Domain
Soviet Union - KGB - Public Domain
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Slowking4 -
Dr. Gastón Guzmán - CC BY 3.0
Luctor - CC BY 3.0
Mathew Brady Levin Corot Handy - Public Domain
U.S. Government Printing Office - Public Domain
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Fregonese, Hugo, 1908-1987
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Georges Seguin (Okki - CC BY-SA 3.0
Zeitoun, Ariel, 1945-....
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Holling, C.S.
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Burke, Thomas A., 1898-1971
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Cherwell, Frederick Alexander Lindemann, Viscount, 1886-1957
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Nooteboom, Cees, 1933-....
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Cdebary - CC BY-SA 4.0
Stoddard, Whitney S.
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Díaz, José, 1896-1942
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Original uploader was Kubigula - Public Domain
Mann, William Hodges, 1843-1927
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Clarke, John H. (John Hessin), 1857-1945
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Hustis, James H., 1864-1942
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Türk, Daniel Gottlob, 1750-1813
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unknown - Public Domain
Hatcher, J. B. (John Bell), 1861-1904
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Mathew Brady - Public Domain
Yulee, David Levy, 1810-1886
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Gouan, Antoine, 1733-1821
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Soviet Union - KGB - Public Domain
Deriabin, Peter, 1921-....
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Public Domain
Brady, Jasper Ewing, 1797-1871
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Slowking4 -
Gantos, Jack.
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Dr. Gastón Guzmán - CC BY 3.0
Guzmán, Gastón
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Luctor - CC BY 3.0
Sombogaart, Ben
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Parker, Peter, 1785-1814
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Kirk, John, Sir, 1832-1922
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Shalev, Meir
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Mathew Brady Levin Corot Handy - Public Domain
Sargent, A. A. (Aaron Augustus), 1827-1887
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Skarga, Piotr, 1536-1612
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Brinton, Daniel G. (Daniel Garrison), 1837-1899
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U.S. Government Printing Office - Public Domain
Rees, Edward H. (Edward Herbert), 1886-1969
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Burrell, Martin, 1858-1938
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Taunton, Henry Labouchere, Baron, 1798-1869
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Melartin, Erkki