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Frederick W. Taylor - Public Domain
Daderot - CC0 1.0
w:George Charles Beresford (1864-1938) - Public Domain
shay aloni - CC BY-SA 2.5
unknown - Public Domain
Nightscream - CC BY 3.0
-nickon- - CC BY-SA 2.0
Matthew G. Boyer at https://www.flickr.com/photos/matthewboyer/ - CC BY-SA 3.0
Mai Le - CC BY 2.0
Rs-foto - CC BY-SA 4.0
Pierre de Coubertin - Public Domain
unknown -
Xavier Martinez - Public Domain
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Castle, William
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Ompteda, Died. Heinr. Ludw., Freiherr von, 1746-1803
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Ingram, Rex, 1892-1950
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Frederick W. Taylor - Public Domain
Gantt, Henry Laurence, 1861-1919
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Vallisnieri, Antonio, 1661-1730
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Daderot - CC0 1.0
Dana, Daniel, 1771-1859
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w:George Charles Beresford (1864-1938) - Public Domain
Sadler, Michael, Sir, 1861-1943
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Wills, Chill, 1902-1978
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shay aloni - CC BY-SA 2.5
Eitan, Raphael, 1929-2004
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Cartier, George-Étienne, Sir, 1814-1873
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unknown - Public Domain
Mertz, Johann Kaspar, 1806-1856
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Althouse, Paul, 1889-1954
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Nightscream - CC BY 3.0
O'Neil, Dennis, 1939-....
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unknown - Public Domain
Rosenzweig, Franz, 1886-1929
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-nickon- - CC BY-SA 2.0
Jones-Gretzky, Janet, 1961-
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unknown - Public Domain
Goulue, 1866-1929
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Iansons, Marius
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Okri, Ben.
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Matthew G. Boyer at https://www.flickr.com/photos/matthewboyer/ - CC BY-SA 3.0
Stiles, Ryan, 1959-
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Straus, Oscar S. (Oscar Solomon), 1850-1926
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Mai Le - CC BY 2.0
Van Sant, Gus
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Rs-foto - CC BY-SA 4.0
Sands, Tommy
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Pierre de Coubertin - Public Domain
Picot, Georges, 1838-1909
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Caine, W. S. (William Sproston), 1842-1903
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unknown -
Josephson, Aksel Gustav Salomon, 1860-1944
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Bowie, Lester
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Kalisch, Isidor, 1816-1886
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David-Néel, Alexandra, 1868-1969
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Xavier Martinez - Public Domain
Martinez, Xavier, 1869-1943
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Pauley, Jane, 1950-