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not credted - Public Domain
Carl Van Vechten - Public Domain
MC2 Erica R. Gardner, USN - Public Domain
U.S. Bureau of Reclamation - Public Domain
Henry Herbert Clifford 1872-1949 - Public Domain
unknown - Public Domain
NBC Television - Public Domain
Demmith - CC BY-SA 4.0
CBS Television - Public Domain
Henk Lindeboom / Anefo -
Ian Howard (of the original picture) -
Unknown - Public Domain
True, Alfred Charles, 1853-1929 - Publisher: Washington, U.S. Govt. print. off. - Public Domain
David Heald - CC0 1.0
anonymous -
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Arolas, Eduardo, 1892-1924
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not credted - Public Domain
Friese, Richard, 1854-1918
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Carl Van Vechten - Public Domain
Ailey, Alvin, 1931-1989
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MC2 Erica R. Gardner, USN - Public Domain
Baker, Anita
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U.S. Bureau of Reclamation - Public Domain
Savage, John L. (John Lucian), 1879-1967
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Fuksas, Massimiliano, 1944-....
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Henry Herbert Clifford 1872-1949 - Public Domain
Marsh, Ngaio, 1895-1982
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unknown - Public Domain
Bonney, Lores, 1897-
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unknown - Public Domain
Waddington, Alfred, 1800?-1872
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NBC Television - Public Domain
Cahn, Sammy
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Høegh-Guldberg, Ove, 1731-1808
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Demmith - CC BY-SA 4.0
Carrigan, Bill, 1883-1969
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Stuart, Arabella, Lady, 1575-1615
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CBS Television - Public Domain
Kruschen, Jack, 1922-2002
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Moszyński, Fryderyk, 1737-1817
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Henk Lindeboom / Anefo -
Boyer, Jacqueline
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Allen, William, 1827-1881
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Dudley, Robert, Sir, 1574-1649
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Ian Howard (of the original picture) -
Weizsäcker, Carl Friedrich, Freiherr von, 1912-2007
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Manuel, Richard, 1943-1986
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Smidt, Heinrich, 1798-1867
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Bell, Thomas Hugh, Sir, 1844-1931
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Philippe, Charles-Louis, 1874-1909
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Digby, Robert, 1732-1815
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Unknown - Public Domain
De Mille, William C. (William Churchill), 1878-1955
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True, Alfred Charles, 1853-1929 - Publisher: Washington, U.S. Govt. print. off. - Public Domain
True, Alfred Charles, 1853-1929
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Cooley, Spade, 1910-1969
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David Heald - CC0 1.0
Farmanfarmaian, Monir Shahroudy, 1924-....
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anonymous -
Gmelin, Philipp Friedrich, 1721-1768
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Pease, Alfred H.