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unknown - Public Domain
Arrow Film Corporation - Public Domain
Kassner -
Erling Mandelmann - CC BY-SA 3.0
USA - Public Domain
Gage Skidmore - CC BY-SA 3.0
JGleick - CC BY-SA 4.0
Sbrousseau - CC BY-SA 3.0
Unknown (20th Century Fox) - Public Domain
Stephencdickson - CC BY-SA 4.0
Marcel Lefrancq - CC BY-SA 3.0
Public Domain
United States Steel Corporation-sponsor of the television show. - Public Domain
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unknown - Public Domain
Feofan, Archbishop of Novgorod, 1681-1736
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Arrow Film Corporation - Public Domain
Herzig, Sig
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Kassner -
Tiller, Nadja, 1929-....
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Hoffmann, Friedrich, 1660-1742
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Willdenow, Karl Ludwig, 1765-1812
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Pesotta, Rose, 1896-
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Farmer, Richard, 1735-1797
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Erling Mandelmann - CC BY-SA 3.0
François, Claude, 1939-1978
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USA - Public Domain
Greely, Adolphus Washington, 1844-1935
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Gage Skidmore - CC BY-SA 3.0
Kasdan, Lawrence, 1949-....
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JGleick - CC BY-SA 4.0
Gleick, James
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unknown - Public Domain
Weeks, Edwin Lord
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Lauzun, Antonin Nompar de Caumont, duc de, 1632 or 1633-1723
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Aylmer, Matthew Whitworth-Aylmer, Baron, 1775-1850
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Warwick, Richard Neville, Earl of, 1428-1471
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Rose, I.
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Sbrousseau - CC BY-SA 3.0
Shaw, Susan, 1946-
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Clarke, Charles Cowden, 1787-1877
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Unknown (20th Century Fox) - Public Domain
Balin, Ina, 1937-1990
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Glenbervie, Sylvester Douglas, Baron, 1743-1823
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Stevens, William Bacon, 1815-1887
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Stephencdickson - CC BY-SA 4.0
Pillans, James, 1778-1864
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Marcel Lefrancq - CC BY-SA 3.0
Breuil, Henri, 1877-1961
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Balée, William L., 1954-
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Kolb, Edward W.
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Albertson, Frank, 1909-1964
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Hubbell, James R. (James Randolph), 1824-1890
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Public Domain
Dubut de Laforest, Jean-Louis, 1853-1902
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United States Steel Corporation-sponsor of the television show. - Public Domain
Lansing, Robert, 1929-1994
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Thorpe, Richard, 1896-1991