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Uyvsdi - Public Domain
Josef Kriehuber - Public Domain
unknown photographer - Public Domain
Alexander Ecker, unknown - Public Domain
Mario De Munck - CC BY-SA 4.0
Christopher Wordsworth - CC BY-SA 3.0
unknown - Public Domain
Landau, Berlin - Public Domain
author - Public Domain
Casa le roche - CC BY-SA 3.0
Fitz Gitler - CC BY 2.0
Toglenn - CC BY-SA 3.0
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Morrison, James H. (James Hobson), 1908-2000
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Uyvsdi - Public Domain
Horse, Michael.
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La Fresnaye, Roger de 1885-1925
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Hancock, Albany, 1806-1873
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Wood, Natalie
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Alt, Rudolf von 1812-1905
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Cyclops (Collier)
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Peters, Carl, 1856-1918
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Josef Kriehuber - Public Domain
Ronconi, Giorgio, 1810-1890
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Zupitza, Julius, 1844-1895
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Verco, Jos. C. (Joseph C.), 1851-1933
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unknown photographer - Public Domain
Acheson, Edward Goodrich, 1856-1931
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Alexander Ecker, unknown - Public Domain
Oken, Lorenz, 1779-1851
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Mario De Munck - CC BY-SA 4.0
Akerman, Chantal
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Christopher Wordsworth - CC BY-SA 3.0
Wordsworth, Richard
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unknown - Public Domain
Synge, R. L. M.
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Landau, Berlin - Public Domain
Behring, Emil von 1854-1917
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author - Public Domain
Thomson, Alexander, 1817-1875
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Travis, June
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unknown - Public Domain
Gerry, Elbridge T. (Elbridge Thomas), 1837-1927
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unknown - Public Domain
Garofalo, Carlo Giorgio, 1886-1962
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Bennett, Arnold, 1867-1931
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Eisele, Donn Fulton, 1930-1987
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Casa le roche - CC BY-SA 3.0
Jeanneret, Pierre, 1896-1967
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Speyer, James, 1861-1941
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Fitz Gitler - CC BY 2.0
Jenkins, John, 1931-
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Zeller, P. C. (Philipp Christoph), 1808-1883
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Cordier, Henri, 1849-1925
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unknown - Public Domain
Windelband, W. (Wilhelm), 1848-1915
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Toglenn - CC BY-SA 3.0
Patrick, Tera, 1976-