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user at project - CC BY 3.0
original uploader - Public Domain
''Motion Picture Magazine'' - Public Domain
Harris and Ewing, circa 1920 - Public Domain
photographer unknown; scanned by myself - Public Domain
Bain - Public Domain
Józef Sonntag (1784-1834) - Public Domain
Franmarie Metzler - Public Domain
Brooklyn Daily Eagle - Public Domain
Africtice - CC BY-SA 4.0
LordRedthorn - CC BY-SA 4.0
Jim Accordino at https://www.flickr.com/photos/jimmyack205/ - CC BY 2.0
Some XVI-century Italian mint - Public Domain
Max.blodgett - CC BY 3.0
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Smart, Jacob E., 1909-2006
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Noel-Baker, Philip, 1889-1982
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Mudge, B. F. (Benjamin Franklin), 1817-1879
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user at project - CC BY 3.0
Etxebarría, Lucía, 1966-
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original uploader - Public Domain
Santa Cruz y Espejo, Francisco Xavier Eugenio de, 1747-1795
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''Motion Picture Magazine'' - Public Domain
Lyons, Eddie, 1886-1926
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Harris and Ewing, circa 1920 - Public Domain
Rodgers, John, 1881-1926
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photographer unknown; scanned by myself - Public Domain
Tryfanwy, 1867-1924
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Bain - Public Domain
Winterhalter, Albert G. (Albert Gustavus), 1856-
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Wolff, Karl, 1900-1984
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Felton, Verna, 1890-1966
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Fox, Stephen, 1627-1716
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Binz, Carl, 1832-1913
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Bowen, Lionel, 1922-2012
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Józef Sonntag (1784-1834) - Public Domain
Sokolnicki, Michał, 1760-1816
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Franmarie Metzler - Public Domain
Kim, Andrew N., 1982-
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Appleton, Samuel, 1766-1853
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Crutzen, Paul J., 1933-....
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Bocca, Julio, 1967-....
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Brooklyn Daily Eagle - Public Domain
Leonard, Moses Gage, 1809-1899
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Hakewill, George, 1578-1649
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Africtice - CC BY-SA 4.0
Binebine, Mahi
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LordRedthorn - CC BY-SA 4.0
Lenat, Douglas B.
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Pogue, William R.
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Jim Accordino at https://www.flickr.com/photos/jimmyack205/ - CC BY 2.0
Nelson, Tracy, 1963-
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Winthrop, John, 1606-1676
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Ferguson, Champ, 1821-1865
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Some XVI-century Italian mint - Public Domain
Sforza, Giovanni, 1466-1510
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Max.blodgett - CC BY 3.0
Wale
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Lamond, Hector, 1865-1947