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unknown - Public Domain
Scienceman1 - CC BY-SA 3.0
Michael Locke - CC BY 2.0
Associated Students, University of California, Los Angeles - Public Domain
author - Public Domain
Mathew Brady - Public Domain
Unknown Oberthur collection - Public Domain
proacguy1 - CC BY 2.0
Thomas Charles Wageman[http://www.rubylane.com/shops/quiarte/item/00051] - Public Domain
Carptrash -
Francis [François] Vivarès & James Caldwell - Public Domain
Ori Gershoni - CC BY-SA 3.0
Unattributed - Public Domain
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Gálvez, Matías de, 1717-1784
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unknown - Public Domain
Perrot, Nicolas, 1644-1718
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Kempe, Alfred John, 1785?-1846
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Turner, Nat, 1800?-1831
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Toller, Ernst, 1893-1939
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Altsheler, Joseph A. (Joseph Alexander), 1862-1919
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unknown - Public Domain
Boyer, Jean Pierre, 1776-1850
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Scienceman1 - CC BY-SA 3.0
Gardner, Don (Musician)
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Regan, Donald T.
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Bachchan, Amitabh, 1942-....
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Lovelace, William King-Noel, Earl of, 1805-1893
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Maseres, Francis, 1731-1824
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Michael Locke - CC BY 2.0
Lynch, Kelly, 1959-....
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Associated Students, University of California, Los Angeles - Public Domain
Powell, Lawrence Clark, 1906-2001
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Wylie, Chalmers P. (Chalmers Pangburn), 1920-1998
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Roberts, Samuel, 1800-1885
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author - Public Domain
Richardson, Robert V., 1820-1870
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Mathew Brady - Public Domain
Smith, Gerrit, 1797-1874
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Unknown Oberthur collection - Public Domain
Guenée, A. (Achille), 1809-1880
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unknown - Public Domain
Schalk, Franz
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Reitz, Deneys, 1882?-1944
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proacguy1 - CC BY 2.0
Sauvé, Jeanne, 1922-
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unknown - Public Domain
Rusticucci, Girolamo
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Thomas Charles Wageman[http://www.rubylane.com/shops/quiarte/item/00051] - Public Domain
Maxwell, Murray, Sir, 1775-1831
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Carptrash -
Buberl, Caspar (American sculptor, 1834-1899)
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Francis [François] Vivarès & James Caldwell - Public Domain
Vivarès, François (1709-1780).
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Koch, Pyke, 1901-1991
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Ori Gershoni - CC BY-SA 3.0
Gershuni, Moshe
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Unattributed - Public Domain
Rosenhain, Jakob, 1813-1894
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Kerr, Walter Talbot, 1839-1927