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unknown - Public Domain
Mathew Brady - Public Domain
Federal Government of the United States - Public Domain
The w:Bureau of Engraving and Printing - CC BY-SA 3.0
Juan Lovera - Public Domain
photographer not credited. - Public Domain
unknown photographer - Public Domain
Vishnugsr - CC BY-SA 3.0
Sorelle Marsini, Lucca - Public Domain
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unknown - Public Domain
Nervi, Pier Luigi
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Mathew Brady - Public Domain
Noyes, William Curtis, 1805-1864
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Hegedušić, Krsto, 1901-1975
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Federal Government of the United States - Public Domain
York, Herbert F. (Herbert Frank)
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The w:Bureau of Engraving and Printing - CC BY-SA 3.0
Barbour, John Strode, 1820-1892
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National Museum of American History (U.S.). Division of Physical Sciences.
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Juan Lovera - Public Domain
Lovera, Juan, 1776-1841
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Yastrzemski, Carl
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unknown - Public Domain
Benedict XV, Pope, 1854-1922
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Wanders, Marcel
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photographer not credited. - Public Domain
Funston, Frederick, 1865-1917
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Goldberg, Adam, 1970-
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Perkins, William, 1558-1602
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Muḥaṣṣiṣ, Ardashīr, 1938-2008
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unknown photographer - Public Domain
Wills, W. G. (William Gorman), 1828-1891
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Kelly, David, Sir, 1891-
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unknown - Public Domain
Hare, John, 1844-1921
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Ramazzini, Bernardino, 1633-1714
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Langner, Lawrence, 1890-1962
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Vishnugsr - CC BY-SA 3.0
Reddy, D. Raj (Dabbala Raj), 1937-
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Nicholas, of Cusa, Cardinal, 1401-1464
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Sorelle Marsini, Lucca - Public Domain
Giraldoni, Leone 1824-1897
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Grey, John, 1785-1868
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Stringer, Arthur, 1874-1950
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Bonham, Milledge L. (Milledge Luke), 1813-1890
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unknown - Public Domain
Blake, Eubie, 1887-1983
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unknown - Public Domain
Hopkinson, Joseph, 1770-1842
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unknown - Public Domain
Garrison, Zina, 1963-
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Phélypeaux de La Vrillère, Louis 1599-1681 duc de
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Cheadle, Walter B. (Walter Butler), 1835-1910