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unknown - Public Domain
Garik83 - CC BY-SA 4.0
https://www.flickr.com/photos/jmrosenfeld/ - CC BY 2.0
Elf - CC BY-SA 3.0
NARA-Author -
Mathew Brady - Public Domain
unknown -
Sarah Stierch - CC BY 2.0
unknown but in 1900s - Public Domain
Nadiabaram - CC BY 3.0
Frank Hewett - Public Domain
Stella Dacuma for Cultchas - CC BY 3.0
University of Tennessee, Knoxville - CC BY-SA 3.0
Jean-Baptiste Nolin (1657?-1708) after Pierre Simon le Vieux (b. 1640) - Public Domain
zeitgenössischer Maler um 1720 - Public Domain
en - Public Domain
Hiart - Public Domain
Angela Sykes -
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Finch, Flora, 1869-1940
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unknown - Public Domain
Jones, Charles Jesse, 1844-1919
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Garik83 - CC BY-SA 4.0
Fortichiari, Bruno
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Kunst, Jaap, 1891-1960
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Gagen-Torn, N. I. (Nina Ivanovna)
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Budd, James Herbert, 1851-1908
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Azzolino, Decio, 1623-1689
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unknown - Public Domain
Vetulani, Tadeusz, 1897-1952
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https://www.flickr.com/photos/jmrosenfeld/ - CC BY 2.0
Kerr, Steve, 1965-
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Elf - CC BY-SA 3.0
Foster, Alan Dean, 1946-....
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NARA-Author -
Krock, Arthur, 1886-1974
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Mathew Brady - Public Domain
Hoe, Richard March, 1812-1886
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unknown -
Doyle, Adrian Conan
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Sarah Stierch - CC BY 2.0
Bailey, Herman Kofi, Jr., 1931-1981
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unknown but in 1900s - Public Domain
Howes, Edith, 1872-1954
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Little, John S. (John Sebastian), 1853-1916
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Gardner, Ava, 1922-1990
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Nadiabaram - CC BY 3.0
Meyer, Pedro, 1935-....
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Frank Hewett - Public Domain
Tangye, Richard, Sir, 1833-1906
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Stella Dacuma for Cultchas - CC BY 3.0
Friedman, Don
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University of Tennessee, Knoxville - CC BY-SA 3.0
Dongarra, J. J.
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Seltzer, Dov
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Jean-Baptiste Nolin (1657?-1708) after Pierre Simon le Vieux (b. 1640) - Public Domain
Ménestrier, Claude-François, 1631-1705
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Croce, Benedetto, 1866-1952
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zeitgenössischer Maler um 1720 - Public Domain
Howard, Philip Thomas, 1629-1694
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en - Public Domain
Booth, Donald P. (Donald Prentice), 1902-1993
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Hiart - Public Domain
Bacon, Henry, 1839-1912
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Semler, Joh. Salomo (Johann Salomo), 1725-1791
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Angela Sykes -
Blacker, Terence
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Günther, Johann Christian, 1695-1723