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John Opie - Public Domain
Gil Megidish - CC BY 2.0
Nathaniel Fish Moore - Public Domain
unknown - Public Domain
NASA - Public Domain
Vrio - CC BY-SA 3.0
DOI - Public Domain
Jeanne Rij-Rousseau (1870-1956) - CC BY-SA 3.0
user at project - CC BY 2.5
Nadar - Public Domain
Siegel, Arthur S. for U.S. Farm Security Administration - Office of War Information - Public Domain
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John Opie - Public Domain
Monro, Henry
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Gil Megidish - CC BY 2.0
Bluth, Don.
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McKenna, J. (Joseph), 1843-1926
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Anatole, Madame 1793-18..
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Nathaniel Fish Moore - Public Domain
Moore, Nathaniel Fish, 1782-1872
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unknown - Public Domain
Hunter, Robert, 1874-1942
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unknown - Public Domain
Solovʹev, Vsevolod Sergeevich, 1849-1903
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Brion, Jon
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NASA - Public Domain
Pierce, John R. (John Robinson), 1910-2002
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Vrio - CC BY-SA 3.0
Wagner, Michael, 1947-
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Wright, Louis T. (Louis Tompkins), 1891-1952
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Reeves, Matt, 1966-....
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Avni, Aki, 1967-
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Jackson, Joe, 1888-1951
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DOI - Public Domain
Norton, Gale Ann, 1954-
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Jeanne Rij-Rousseau (1870-1956) - CC BY-SA 3.0
Rij-Rousseau, Jeanne, 1870-1956
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Timmermans, Felix, 1886-1947
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Straus, Oscar S. (Oscar Solomon), 1850-1926
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unknown - Public Domain
Steere, Joseph Beal, 1842-1940
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Colville, Alex, 1920-2013
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Dale, Sam, 1772-1841
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Passer, Ivan
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user at project - CC BY 2.5
Lee, Francis, 1944 November 13-
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Nadar - Public Domain
Puyo, Emile Joachim Constant, 1857-1933
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unknown - Public Domain
Grant, Robert Edmond, 1793-1874
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unknown - Public Domain
McRae, Dandridge, 1829-1899
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Luther, Martin, 1483-1546
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Funk, Casimir, 1884-1967
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Siegel, Arthur S. for U.S. Farm Security Administration - Office of War Information - Public Domain
Eisenhower, Milton Stover, 1899-1985
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Manrique, Jorge, 1440?-1479