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United States Congress - Public Domain
Reginald Haines (1872-1941) - Public Domain
Popular Press Media Group - CC BY-SA 3.0
Gina Manfredi ocampo - Public Domain
GSAPPstudent - CC BY-SA 4.0
Unknown military photographer of the Signal Corps - Public Domain
Kwilliams78 - CC BY-SA 4.0
Udo Grimberg -
Hammondite - CC BY 3.0
LSE Library - Public Domain
Mykel Nicolaou - CC BY-SA 3.0
unknown - Public Domain
Gerard Soest -
Editors: Jeanie Strecker and Ruth Ann Packer - Public Domain
Public Domain
Oriental Institute, University of Oxford - CC BY-SA 4.0
The Biographical Society, Boston - Public Domain
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United States Congress - Public Domain
Coverdell, Paul Douglas, 1939-2000
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Francesco Sforza, Duke of Milan, 1401-1466
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Panigel, Raphael Meir ben Judah, 1804-1893
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Reginald Haines (1872-1941) - Public Domain
Horne, C. Silvester (Charles Silvester), 1865-1914
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Popular Press Media Group - CC BY-SA 3.0
Mascolo, Joseph, 1929-
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Gina Manfredi ocampo - Public Domain
Francia, José Gaspar Rodríguez de, 1766-1840
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GSAPPstudent - CC BY-SA 4.0
Sutton, Sharon E., 1941-....
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Rungenhagen, Carl Friedrich, 1778-1851
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Unknown military photographer of the Signal Corps - Public Domain
Herr, John K.
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Kwilliams78 - CC BY-SA 4.0
Roberts, Paul William.
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Udo Grimberg -
Roland, Jürgen 1925-2007
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Darwin Fox, William, 1805-1880
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Hammondite - CC BY 3.0
Smith, Jimmy
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LSE Library - Public Domain
Meade, J.E. (James Edward), 1907-1995
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Blaas, Julius von, 1845-1922.
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Putnam, Herbert
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Mykel Nicolaou - CC BY-SA 3.0
Stanford, Peter, 1961-....
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unknown - Public Domain
Confalonieri, Federico, 1785-1846
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Keller, Arthur Ignatius, 1866-1924
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Gerard Soest -
Russell, William, Lord, 1639-1683
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Editors: Jeanie Strecker and Ruth Ann Packer - Public Domain
Dyer, Alvin R. (Alvin Rulon), 1903-1977
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Public Domain
Clarke, Frederick J. (Frederick James), 1915-2002
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Berry, William H.
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Oriental Institute, University of Oxford - CC BY-SA 4.0
Margoliouth, D.S. (David Samuel), 1858-1940
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Milch, David, 1945-....
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Zwyssig, Alberich, 1808-1854
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unknown - Public Domain
Fortoul, Hippolyte, 1811-1856
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Ton, Konstantin Andreevich, 1794-1881
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Okri, Ben.
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The Biographical Society, Boston - Public Domain
Fletcher, Ryland, 1799-1885