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DoD - Public Domain
United States Senate Historical Office - Public Domain
Contemporary photograph - Public Domain
unknown - Public Domain
Eugène Verboeckhoven - Public Domain
Allan warren - CC BY-SA 3.0
Raymond/author -
Thomas Ewing French (designer) & Arthur Nelson Macdonald (engraver) - Public Domain
Contributor(s): Fegan - Public Domain
CBS Television - Public Domain
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Lagrange, Joseph, Comte, 1761-1836,
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Castro, João Augusto de Araújo, 1919-1975
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Grandrieux, Philippe
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DoD - Public Domain
Kim, Young Sam, 1927-
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United States Senate Historical Office - Public Domain
Ewing, Tom, 1935-
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Contemporary photograph - Public Domain
Strong, Augustus Hopkins, 1836-1921
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Sumner, Charles A. (Charles Allen), 1835-1903
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Cartwright, Edmund, 1743-1823
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Hains, T. Jenkins (Thornton Jenkins), 1866-
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unknown - Public Domain
Klaproth, Julius von, 1783-1835
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unknown - Public Domain
Fox, Fontaine, 1884-1964
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Eugène Verboeckhoven - Public Domain
Schelfhout, Andreas, 1787-1870
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Allan warren - CC BY-SA 3.0
Scofield, Paul, 1922-2008
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Baldwin, John Brown, 1820-1873
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Greenough, George Bellas, 1778-1855
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Root, Joseph Mosley, 1807-1879
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Morstin, Ludwik Hieronim, 1886-1966
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unknown - Public Domain
Gazzaniga, Giuseppe, 1743-1818
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Raymond/author -
Rainer, Yvonne, 1934-
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Thomas Ewing French (designer) & Arthur Nelson Macdonald (engraver) - Public Domain
Mills, William C. (William Corless), 1860-1928
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Bostwick, Barry
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Hunt, Samantha
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Batlle y Ordóñez, José, 1856-1929
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Hicks, William, 1830-1883
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Hailstone, Bernard
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Contributor(s): Fegan - Public Domain
Larcombe, J. (James), 1884-
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Moynihan, Berkeley Moynihan, Baron, 1865-1936
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CBS Television - Public Domain
Marchand, Nancy, 1928-2000
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Massen, Osa
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Lautmann, Rüdiger (1935- ).