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National Democratic Congress party of Ghana - CC BY-SA 3.0
unknown - Public Domain
Julius Giere - Public Domain
USMC - Public Domain
Harris & Ewing, photographer - Public Domain
Roberto Vicario - CC BY-SA 3.0
Mary Dawson Turner Thomas Phillips - Public Domain
Staff Sgt. Lillian Harnden of the U.S. Utah Air National Guard - Public Domain
© Eric Schaal / Weidle Verlag - CC BY-SA 3.0
Unspecified - Public Domain
Weaver Studio, Cleveland, OH. - Public Domain
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National Democratic Congress party of Ghana - CC BY-SA 3.0
Atta-Mills, John Evans
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Alexander, the Great, 356 B.C.-323 B.C.
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Drinkwater, John, 1882-1937
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Wilson, G. W. (George Washington), 1823-1893
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Bradlaugh, Charles, 1833-1891
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unknown - Public Domain
Bridel, Philippe-Sirice, 1757-1845
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Julius Giere - Public Domain
Sertürner, Friedrich Wilhelm 1783-1841
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USMC - Public Domain
March, William, 1893-1954
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unknown - Public Domain
Clay, C. C. (Clement Claiborne), 1816-1882
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Calov, Abraham, 1612-1686
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Hill, Thomas, 1818-1891
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Harris & Ewing, photographer - Public Domain
Lawson, Alfred W. (Alfred William), 1869-1954
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Ponsonby, John, 1713-1789
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Roberto Vicario - CC BY-SA 3.0
Albertazzi, Giorgio
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Mary Dawson Turner Thomas Phillips - Public Domain
Palgrave, Francis, Sir, 1788-1861
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Staff Sgt. Lillian Harnden of the U.S. Utah Air National Guard - Public Domain
Hawkes, Sharlene Wells, 1964-
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Budiansky, Stephen.
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unknown - Public Domain
Hodgkin, A. L. (Alan Lloyd)
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Petőfi, Sándor, 1823-1849
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© Eric Schaal / Weidle Verlag - CC BY-SA 3.0
Křenek, Ernst
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Sharma, Monty
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Tans'ur, William, 1699?-1783
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Ward, Adolphus William, Sir, 1837-1924
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Gorman, Arthur P. (Arthur Pue), 1839-1906
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Legge, Thomas, 1535-1607
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Unspecified - Public Domain
Brandt, Marianne, 1842-1921
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Kane, Candye
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Sharp, Daniel, 1783-1853
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Erwin, Henry Eugene, 1921-2002
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Weaver Studio, Cleveland, OH. - Public Domain
Stanley, Frank C., 1868-1910