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Lowell State Teachers College - Public Domain
Government work in public domain, photographer unknown - Public Domain
unknown - Public Domain
Unidentified photographer - Public Domain
not stated - Public Domain
original uploader - CC BY 2.5
Il Circolo dei lettori – Photo di Nadia Pugliese - CC BY 2.0
Paulsloane - CC BY-SA 3.0
Udo Grimberg -
Photographer not credited - Public Domain
Harris & Ewing - Public Domain
Claudiosurek - Public Domain
Robert Fritz - CC BY 3.0
user at project - Public Domain
Svenska dagbladets årsbok 1924 - Public Domain
w - Public Domain
Unknown / desconocido - Public Domain
Bain News Service - Public Domain
Marie Horthemels (graveur) - Public Domain
Non crédité - Public Domain
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Lowell State Teachers College - Public Domain
Tucker, Forrest, 1919-1986
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Government work in public domain, photographer unknown - Public Domain
Lubin, Isador, 1896-1978
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Geulincx, Arnold, 1624-1669
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Schmidt, Joseph, 1904-1942
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Khakhar, Bhupen, 1934-2003
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Clark, Henry T. (Henry Toole), 1808-1874
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Zermelo, Ernst, 1871-1953
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Gazzara, Ben, 1930-2012
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unknown - Public Domain
Trench, Richard Chenevix, 1807-1886
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Unidentified photographer - Public Domain
MacRae, Elmer Livingston, 1875-1953
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not stated - Public Domain
Comstock, Harriet T. (Harriet Theresa), 1860-
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original uploader - CC BY 2.5
Attenborough, David, 1926-....
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Il Circolo dei lettori – Photo di Nadia Pugliese - CC BY 2.0
Capucci, Roberto, 1930-....
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Paulsloane - CC BY-SA 3.0
Sloane, Paul, 1950-....
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De Laguna, Theodore, 1876-1930
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Udo Grimberg -
Schell, Maximilian.
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Photographer not credited - Public Domain
Towne, Charles A. (Charles Arnette), 1858-1928
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Harris & Ewing - Public Domain
Rossdale, Albert B. (Albert Berger), 1878-1968
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Robles Pezuela, Manuel, 1817-1862
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Claudiosurek - Public Domain
Cortez, Alberto, 1940-
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Robert Fritz - CC BY 3.0
Fritz, Robert, 1943-
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user at project - Public Domain
Gifford, Frank, 1930-
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Buckley, William, 1780-1856
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Svenska dagbladets årsbok 1924 - Public Domain
Nordenskiöld, Erland, 1877-1932
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w - Public Domain
Simpson, Robert L. (Robert Leatham), 1915-2003
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Unknown / desconocido - Public Domain
Jászi, Oszkár, 1875-1957
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Bain News Service - Public Domain
Moulton, J. Fletcher (John Fletcher), 1844-1921
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Marie Horthemels (graveur) - Public Domain
Quesnel, Pasquier, 1634-1719
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Zhu, Xi, 1130-1200
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Non crédité - Public Domain
Salinger, Conrad