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Henry Holt and Co., 1909 - Public Domain
unknown - Public Domain
Office of Behavioral and Social Sciences Research, OD/NIH - Public Domain
Jim.henderson - CC BY 4.0
Bain News Service - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
original uploader - Public Domain
unknown photographer - Public Domain
Simon Guirlinger -
Ben Mason -
original uploader - CC BY-SA 3.0
Leopold Seyfert, painter - Public Domain
Lisa G Bauer - CC BY 2.0
Martin Kraft - CC BY-SA 3.0
The Nobel Foundation - Public Domain
Knud Bergslien - Public Domain
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Henry Holt and Co., 1909 - Public Domain
Finch, Francis M. (Francis Miles), 1827-1907
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Butler, Richard, 1743-1791
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unknown - Public Domain
Lebedeff, Ivan, 1894-1953
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Ashe, Victor H. (Victor Henderson), 1945-
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Office of Behavioral and Social Sciences Research, OD/NIH - Public Domain
Riley, Matilda White, 1911-....
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Jim.henderson - CC BY 4.0
Collegiate School (New York, N.Y.)
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Maine de Biran, Pierre, 1766-1824
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Noel, Jules Achille
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Bain News Service - Public Domain
Holmes, John Haynes, 1879-1964
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Mathew Brady Levin Corot Handy - Public Domain
McDonald, Joseph E. (Joseph Ewing), 1819-1891
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original uploader - Public Domain
Bloomfield-Zeisler, Fannie, 1863-1927
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Michaud, J. Fr. (Joseph Fr.), 1767-1839
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unknown photographer - Public Domain
Leland, Charles Godfrey, 1824-1903
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Simon Guirlinger -
Larcenet, Manu
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Ben Mason -
Jackson de Llano, George O.
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unknown - Public Domain
Crane, Stephen, 1871-1900
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original uploader - CC BY-SA 3.0
Bond, Henry, 1966-....
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Merle d'Aubigné, J. H. (Jean Henri), 1794-1872
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Leopold Seyfert, painter - Public Domain
Stevenson, Sara Yorke, 1847-1921
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Lisa G Bauer - CC BY 2.0
Paulus, Stephen
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Martin Kraft - CC BY-SA 3.0
Schlöndorff, Volker
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Fellowes, Daisy
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original uploader - Public Domain
Claret y Clará, Antonio María, saint, 1807-1870
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The Nobel Foundation - Public Domain
Haber, Fritz, 1868-1934
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Heath, Nicholas, 1501?-1578
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Knud Bergslien - Public Domain
Maurer, Konrad von 1823-1902
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Hinsley, F.H. (Francis Harry), 1918-
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Foot, Jesse, 1744-1826
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Greenwood, Ethan Allen, 1779-1856
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Stevenson, Edward Luther, 1858-1944