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Sophie Stern - CC BY-SA 4.0
Totoylooks - CC BY-SA 3.0
Bain - Public Domain
A Newsam del, Lehman & Duval Lithographers, - Public Domain
engraved by W. Delff after a painting by C. Duyster - Public Domain
unknown photographer - Public Domain
Benjamin N. Duke - Public Domain
wikipedia:George Dance the Younger - Public Domain
NASA - Public Domain
Alexis Wenski-Roberts, Lexy Roberts Imaging -
Someone in the U.S. Army. - Public Domain
Auburn University -
Fyodor Bronnikov - Public Domain
John Neagle - Public Domain
Dan Harasymchuk - CC BY-SA 4.0
Ambroise Tardieu (1788-1841) - Public Domain
unknown -
Henri Evenepoel - Public Domain
Jmserrano77 - CC BY-SA 4.0
Tvhistoryfan - CC BY-SA 4.0
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Sophie Stern - CC BY-SA 4.0
Stern, Leo, 1862-1904
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Totoylooks - CC BY-SA 3.0
Suarez, Bobby A.
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Bain - Public Domain
Biddle, Anthony J. Drexel (Anthony Joseph Drexel), 1874-1948
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A Newsam del, Lehman & Duval Lithographers, - Public Domain
Schweinitz, Lewis David von 1780-1834
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engraved by W. Delff after a painting by C. Duyster - Public Domain
Delmedigo, Joseph Solomon, 1591-1655
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Kenojuak, 1927-2013
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Suzuki, David T., 1936-....
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unknown photographer - Public Domain
Godfrey, Edward Settle, 1843-1932
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Moore, John, Sir, 1761-1809
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Benjamin N. Duke - Public Domain
Astor, Vincent, 1891-1959
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wikipedia:George Dance the Younger - Public Domain
Gilpin, Sawrey, 1733-1807
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NASA - Public Domain
Cleave, Mary Louise
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Alexis Wenski-Roberts, Lexy Roberts Imaging -
Veverka, Joseph
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Naʼaman, Michal
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Lukács György 1865-1950
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Someone in the U.S. Army. - Public Domain
Ashford, Bailey K. (Bailey Kelly), 1873-1934
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Auburn University -
Sparks, Chauncey, 1884-1968
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Fyodor Bronnikov - Public Domain
Zucchi, Virginia, 1849-1930
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Pushkin, Aleksandr Sergeevich, 1799-1837
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Sassetti, Francesco, 1421-1490
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John Neagle - Public Domain
Roberts, Robert R. (Robert Richford), 1778-1843
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Dan Harasymchuk - CC BY-SA 4.0
Govier, Katherine, 1948-....
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Ambroise Tardieu (1788-1841) - Public Domain
Laugier, M., 1770-1832
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unknown -
Kinard, John, 1936-1989
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Henri Evenepoel - Public Domain
Pougin, Arthur, 1834-1921
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Kyle, David A.
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Saunders, Cicely M., Dame
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Jmserrano77 - CC BY-SA 4.0
Etkin, Mariano
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Merriam, William Rush, 1849-1931
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Tvhistoryfan - CC BY-SA 4.0
Aylesworth, John