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unknown - Public Domain
Associated Students, University of California, Los Angeles - Public Domain
LaurenPB - CC BY 3.0
Seattle World's Fair newsroom. There's a photographer's mark at lower left but I can't make out the signature. - Public Domain
Sjsualum - Public Domain
Copyright holder releases image per Commons:OTRS - CC BY-SA 3.0
Edmondchacha - CC BY-SA 4.0
Mathew Brady Levin Corot Handy - Public Domain
British Academy Web Master - CC BY-SA 3.0
Staff Photographers - CC BY-SA 4.0
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Poivre, Pierre, 1719-1786
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unknown - Public Domain
Hamilton, Charles Smith, 1822-1891
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unknown - Public Domain
Tigert, John James, 1882-1965
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Sanders, Bill, 1933-
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Almond, J. Lindsay (James Lindsay), 1898-1986
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unknown - Public Domain
Saint-Priest, Alexis Guignard de, comte, 1805-1851
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Ton, Konstantin Andreevich, 1794-1881
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unknown - Public Domain
Cournot, A.A. (Antoine Augustin), 1801-1877
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Associated Students, University of California, Los Angeles - Public Domain
Jacoby, Neil H. (Neil Herman), 1909-1979
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Havergal, Frances Ridley, 1836-1879
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Fallières, Armand, 1841-1931
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Black, Samuel Charles, 1869-1921
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Tossanus, Paul, 1572-1634
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LaurenPB - CC BY 3.0
Hunter, Paul, 1933-
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Seattle World's Fair newsroom. There's a photographer's mark at lower left but I can't make out the signature. - Public Domain
Munsel, Patrice, 1925-
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Boucher, Rick, 1946-
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Sjsualum - Public Domain
Walsh, Bill, 1931-2007
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Seillière, Ernest Antoine Aimé Léon, Baron, 1866-
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Thomson, Joseph, 1858-1895
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Copyright holder releases image per Commons:OTRS - CC BY-SA 3.0
Corbett, Richard, 1955-
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Hewlett, Richard G.
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unknown - Public Domain
Portlock, Nathaniel, 1748?-1817
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Kaunitz-Rietberg, Wenzel Anton, Fürst, 1711-1794
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Edmondchacha - CC BY-SA 4.0
Li, Shuang, 1957-....
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Mathew Brady Levin Corot Handy - Public Domain
Randolph, Theodore F. (Theodore Fitz), 1826-1883
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unknown - Public Domain
Gerard, James W. (James Watson), 1867-1951
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British Academy Web Master - CC BY-SA 3.0
Gardner, Edmund G., 1869-1935
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Staff Photographers - CC BY-SA 4.0
Barneby, Rupert C.
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Thompson, Craig, 1975-....
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Leduc, Ozias