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Auguste Pichon - Public Domain
Slowking4 -
Pressens Bild - Public Domain
Heikki Tuuli, photographer and Jimmy Lopez, copyright holder - CC BY-SA 3.0
http://faculty.frostburg.edu/mbradley/psyography/edwardtolman.html -
Photographer:Maurice Seymour, Chicago. - Public Domain
Data about W. G. Helsby - Public Domain
anonymous -
Mathew Brady Levin Corot Handy - Public Domain
Robobix - CC BY-SA 4.0
unknown - Public Domain
Public Domain
José Malanca - Public Domain
Mongyamba - CC BY-SA 3.0
anonymous - Public Domain
Mathew Brady - Public Domain
Salva1745 - CC BY 2.0
Mark Neyman - CC BY-SA 3.0
Napoleon Sarony, 37 Union Square, New York City (compare Control No. 99471730) - Public Domain
No photographer credited in original source. - Public Domain
Image from Wikimedia Commons
Auguste Pichon - Public Domain
Montalembert, Charles Forbes, comte de, 1810-1870
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Slowking4 -
Roberts, Kim, 1961-
Image from Wikimedia Commons
Pressens Bild - Public Domain
Hannerz, Ulf.
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Dallin, Cyrus E. (Cyrus Edwin), 1861-1944
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English, Robert H. (Robert Henry), 1888-1943
Image from Wikimedia Commons
Heikki Tuuli, photographer and Jimmy Lopez, copyright holder - CC BY-SA 3.0
López, Jimmy 1978-
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Pickett, Owen B. (Owen Bradford), 1930-2010
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http://faculty.frostburg.edu/mbradley/psyography/edwardtolman.html -
Tolman, Edward Chace, 1886-1959
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Photographer:Maurice Seymour, Chicago. - Public Domain
Long, Avon
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Data about W. G. Helsby - Public Domain
Alberdi, Juan Bautista, 1810-1884
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Parkhill, Archdale, Sir, 1879-1947
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anonymous -
Orlik, Emil, 1870-1932
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Mathew Brady Levin Corot Handy - Public Domain
Hale, Eugene, 1836-1918
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Robobix - CC BY-SA 4.0
Christiansen, C. (Christian), 1843-1917
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unknown - Public Domain
Dupré, Julien, 1851-1910
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Public Domain
Breuer, Josef, 1842-1925
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Boyden, Uriah A. (Uriah Atherton), 1804-1879
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José Malanca - Public Domain
Mariátegui, José Carlos, 1894-1930
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Mongyamba - CC BY-SA 3.0
Brooks, N. C. (Nathan Covington), 1809-1898
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unknown - Public Domain
Wharton, Gabriel Colvin, 1824-1906
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anonymous - Public Domain
Valdés, Fernando de, 1483-1568
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Mathew Brady - Public Domain
Ramsey, Alexander, 1815-1903
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Hochster, Melvin, 1943-....
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L'Épée, Charles-Michel de (1712-1789).
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Bunche, Ralph J. (Ralph Johnson), 1904-1971
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Salva1745 - CC BY 2.0
McBride, Martina
Image from Wikimedia Commons
Mark Neyman - CC BY-SA 3.0
Lagravenese, Richard
Image from Wikimedia Commons
Napoleon Sarony, 37 Union Square, New York City (compare Control No. 99471730) - Public Domain
Grace, William Russell, 1832-1904
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Century 21 Exposition (1962 : Seattle, WA)
Image from Wikimedia Commons
No photographer credited in original source. - Public Domain
Onégin, Sigrid (1889-1943).