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Open Knowledge Foundation - CC BY 2.0
unknown - Public Domain
unknown photographer - Public Domain
Smithsonian Institution - Public Domain
Ghost-bat - CC BY-SA 3.0
Ronald K.L. Collins - CC BY-SA 3.0
Public Domain
Frankie Fouganthin - CC BY-SA 3.0
Ramón Pérez - Public Domain
Linda A. Cicero / Stanford News Service - CC BY 3.0
TMorlier, Fondapol - CC BY-SA 2.5
Mention obligatoire: Photo Jean-Marc Volta - CC BY-SA 3.0
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Open Knowledge Foundation - CC BY 2.0
Ellis, John, 1946-....
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French, Edwin Davis, 1851-1906
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unknown - Public Domain
Hofmann, Ludwig von 1861-1945
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Milles, Jeremiah, 1714-1784
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unknown - Public Domain
Allen, John, 1796-1851
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unknown photographer - Public Domain
Skottsberg, Carl, 1880-1963
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Johnson, James P. (James Price), 1894-1955
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Ravilious, Eric William, 1903-1942
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unknown photographer - Public Domain
Ferguson, Larry.
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Smithsonian Institution - Public Domain
Turner, Abby H. (Abby Howe), 1875-1957
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Glover, John, 1732-1797
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Kennedy, Patrick J. (Patrick Joseph), 1967-
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Long, Roger, 1680-1770
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Ghost-bat - CC BY-SA 3.0
Ki-Zerbo, Joseph.
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Ronald K.L. Collins - CC BY-SA 3.0
Collins, Ronald K.L.
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Cassuto, Umberto, 1883-1951
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Brooks, Maria Gowen, 1794 or 1795-1845
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Sokoloff, Vladimir, 1889-1962
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Smith, W. H. (William Henry), 1825-1891
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Public Domain
Kinloch, Francis, 1755-1826
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Johnson, Junior, 1931-
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Janet, Paul, 1823-1899
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Johnston, Joe, 1950-....
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Frankie Fouganthin - CC BY-SA 3.0
Hamilton, Carl
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Mitten, William, 1819-1906
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Ramón Pérez - Public Domain
Allende, Ignacio, 1769-1811
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Linda A. Cicero / Stanford News Service - CC BY 3.0
Arrow, Kenneth Joseph, 1921-....
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TMorlier, Fondapol - CC BY-SA 2.5
Schnapper, Dominique
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Mention obligatoire: Photo Jean-Marc Volta - CC BY-SA 3.0
Gatti, Daniele
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Shelby, Joseph Orville, 1830-1897