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Steve Kwak - CC BY 2.0
Public Domain
George Albert Smith - Public Domain
Hubert von Herkomer - Public Domain
Leopoldis - Public Domain
Unknown; scanned by 天竺鼠 - Public Domain
unknown - Public Domain
Pvt pauline - CC BY-SA 3.0
Stare of Florida / Kenneth R. Fox (artist) - Public Domain
Ruth ellen kocher - Public Domain
TGC-Topps Gum Cards - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
C.H. Whiting, Publisher and Bookseller, 137 Wabash Avenue, Chicago, copyrighted 1886 - Public Domain
U.S. Senate - Public Domain
Stephencdickson - CC BY-SA 4.0
Image from Wikimedia Commons
Marischal, William Keith, Earl, approximately 1665-1712
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Soler, Josep
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Steve Kwak - CC BY 2.0
McGraw, Tim, 1967-
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Efrat, Benni, 1936-....
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Bézout, Étienne, 1730-1783
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Davis, William G.
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Public Domain
Istria, Dora d', comtesse, 1828-1888
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Katō, Shizue, 1897-
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George Albert Smith - Public Domain
Smith, George Albert, 1870-1951
Image from Wikimedia Commons
Hubert von Herkomer - Public Domain
Lawson, Cecil Gordon, 1851-1882
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Leopoldis - Public Domain
Presas, Leopoldo, 1915-2009
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Morrison, deLesseps S. (deLesseps Story), 1912-1964
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Blunck, Detlev, 1798-1854
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Unknown; scanned by 天竺鼠 - Public Domain
Hu, Shi, 1891-1962
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unknown - Public Domain
Curtis, Betty
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Rudolf August, Duke of Brunswick-Lüneburg, 1627-1704
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Pvt pauline - CC BY-SA 3.0
Baker, Peter, 1967-....
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Stare of Florida / Kenneth R. Fox (artist) - Public Domain
Martinez, Robert, 1934-
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Ruth ellen kocher - Public Domain
Kocher, Ruth Ellen, 1965-
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Hamilton, Anthony, Count, approximately 1646-1720
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Blackburn, Robert Hamilton, 1920-
Image from Wikimedia Commons
TGC-Topps Gum Cards - Public Domain
Freed, Alan
Image from Wikimedia Commons
Mathew Brady Levin Corot Handy - Public Domain
Cavanaugh, James Michael, 1823-1879
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Gilmore, Eugene Allen, 1871-
Image from Wikimedia Commons
C.H. Whiting, Publisher and Bookseller, 137 Wabash Avenue, Chicago, copyrighted 1886 - Public Domain
Alden, Isabella Macdonald, 1841-1930
Image from Wikimedia Commons
U.S. Senate - Public Domain
Clark, Dick, 1928-
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Foster, Pops, 1892-1969
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Stephencdickson - CC BY-SA 4.0
Fraser, A. (Archibald), 1736-1815
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Bentzon, Jørgen
Image from Wikimedia Commons
Gemini IV (Spacecraft)