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Erling Mandelmann - CC BY-SA 3.0
Andrew Robertson - Public Domain
nicolas genin - CC BY-SA 2.0
Georges Biard - CC BY-SA 3.0
Unknown contemporary author - Public Domain
Adamsharp -
Gage Skidmore - CC BY-SA 3.0
Bobbejaan Schoepen Archive -
Vyacheslav Lypynsky - Public Domain
unknown photographer - Public Domain
Philippe Pelletier - CC BY-SA 4.0
:en:Special:Contributions/Labbs - CC BY-SA 3.0
PLoS - CC BY 3.0
Nadiabaram - CC BY 3.0
National Institute of Standards and Technology - Public Domain
Peters, Hans / Anefo -
Joseph Brown - Public Domain
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Hormay, August Ludwig, 1907-1999
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Godwin, E. W. (Edward William), 1833-1886
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Erling Mandelmann - CC BY-SA 3.0
Moret, Norbert, 1921-1998
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Rush, Richard, 1930-
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Andrew Robertson - Public Domain
Gwilt, Joseph, 1784-1863
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nicolas genin - CC BY-SA 2.0
Bird, Brad, 1957-
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Georges Biard - CC BY-SA 3.0
Ayouch, Nabil
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Arnault, A.V. (Antoine Vincent), 1766-1834
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Unknown contemporary author - Public Domain
Bentivoglio d'Aragona, Marco Cornelio, 1668-1732
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Adamsharp -
Martin, Giles, 1969-
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Seebohm, Henry, 1832-1895
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Hilborn, Samuel G. (Samuel Greeley), 1834-1899
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Gage Skidmore - CC BY-SA 3.0
McFarlane, Todd.
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Lartet, Louis, 1840-1899
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Pokagon, Simon, 1830-1899
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Malherbe, Charles, 1853-1911
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Rice, William North, 1845-1928
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Bobbejaan Schoepen Archive -
Brel, Jacques
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Sellar, W.Y. (William Young), 1825-1890
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Vyacheslav Lypynsky - Public Domain
Lypynsʹkyĭ, Vi︠a︡cheslav, 1882-1931
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Benedict, Cleve, 1935-
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unknown photographer - Public Domain
Wagner, Rob, 1872-1942
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Philippe Pelletier - CC BY-SA 4.0
Afonso, Yves, 1944-....
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:en:Special:Contributions/Labbs - CC BY-SA 3.0
Dillon, Steve.
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PLoS - CC BY 3.0
Ashburner, M.
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Nadiabaram - CC BY 3.0
Meyer, Pedro, 1935-....
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National Institute of Standards and Technology - Public Domain
Burgess, G. K. (George Kimball), 1874-1932
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Young, Allyn Abbott, 1876-1929
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Peters, Hans / Anefo -
Goscinny, 1926-1977
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Joseph Brown - Public Domain
Gully, John, 1783-1863