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Engraver John Cochran, artist Henry Wyatt - Public Domain
Gage Skidmore - CC BY-SA 3.0
H. Rousseau - Public Domain
Cdebary - CC BY-SA 4.0
IAEA Imagebank -
Harris-Ewing - Public Domain
Frances Benjamin Johnston - Public Domain
Sprockethead1 - CC BY-SA 3.0
unknown - Public Domain
George Grantham Bain Collection (Library of Congress) - Public Domain
redfalo - CC BY-SA 2.0
unknown - CC BY-SA 2.5
Victor Valore - CC BY-SA 3.0
Bain - Public Domain
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Engraver John Cochran, artist Henry Wyatt - Public Domain
Lawrence, William Beach, 1800-1881
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Gage Skidmore - CC BY-SA 3.0
Erickson, Erick
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Gastrell, Francis, 1662-1725
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H. Rousseau - Public Domain
Hersent, Louis, 1777-1860
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Cdebary - CC BY-SA 4.0
Krens, Thomas.
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IAEA Imagebank -
Khoman, Thanat
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Economus, Peter C. (Peter Constantine), 1943-
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Day, Arthur L. (Arthur Louis), 1869-1960
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Harris-Ewing - Public Domain
Calderón Guardia, Rafael Angel 1900-1970
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Vermeyen, Jan Cornelisz, 1500?-1559
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Frances Benjamin Johnston - Public Domain
Draper, Ruth, 1884-1956
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Sprockethead1 - CC BY-SA 3.0
Iltis, Hugo, 1882-
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Dyer, Mary, -1660
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Schücking, Walther, 1875-1935
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Del Valle, Pedro A. (Pedro Augusto), 1893-1978
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unknown - Public Domain
Meibom, Heinrich, 1638-1700
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Admiral Dot, -1918
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George Grantham Bain Collection (Library of Congress) - Public Domain
Mezes, Sidney Edward, 1863-1931
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redfalo - CC BY-SA 2.0
Granger, C. W. J. (Clive William John), 1934-2009
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unknown - Public Domain
Aldrich, Henry, 1647-1710
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Alvares, Manuel, 1526-1583?
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Raspail, F.-V. (François-Vincent), 1794-1878
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unknown - CC BY-SA 2.5
Reale, Miguel
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Victor Valore - CC BY-SA 3.0
Gabold, Ingolf
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unknown - Public Domain
Cárcova, Ernesto de la 1866-1927
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unknown - Public Domain
Frazer, John Fries, 1812-1872
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Ferrier, Susan, 1782-1854
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unknown - Public Domain
Wetz, Richard, 1875-1935
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Verney, Harry, Sir, 1801-1894
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Bain - Public Domain
Belmont, Eleanor Robson, 1879-1979