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MSRCambridge - CC BY-SA 4.0
History at NIH - Public Domain
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Joseph Kriehuber - Public Domain
George Grantham Bain Collection (Library of Congress) - Public Domain
Jean-Luc Ourlin - CC BY-SA 2.0
DR - CC BY-SA 2.0
CharcoalsMom - CC BY-SA 3.0
unknown - Public Domain
US Government Printing Office - Public Domain
Ernst Hanfstaengl - Public Domain
Not identified - Public Domain
W. T. Fry - Public Domain
Unknown -
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Zaturenska, Marya, 1902-1982
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Beyer, Frank, 1932-2006
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Rush, Daniella 1976-....
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MSRCambridge - CC BY-SA 4.0
Bishop, Christopher M.
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History at NIH - Public Domain
Kornberg, Arthur, 1918-2007
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Legendre, A. M. (Adrien Marie), 1752-1833
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Photo by Christopher Peterson - CC BY 3.0
Herrera, Carolina, 1939-
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Joseph Kriehuber - Public Domain
Nicolai, Otto, 1810-1849
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Mercante, Víctor (1870-1934).
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George Grantham Bain Collection (Library of Congress) - Public Domain
Farnham, Sally James, 1869-1943
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Jean-Luc Ourlin - CC BY-SA 2.0
Costello, Elvis
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DR - CC BY-SA 2.0
Maspero, François, 1932-
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CharcoalsMom - CC BY-SA 3.0
Fry, Donald K.
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unknown - Public Domain
Littlefield, Charles E. (Charles Edgar), 1851-1915
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Clarke, Stanley
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Lund, James L.
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US Government Printing Office - Public Domain
Link, Arthur A.
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Ernst Hanfstaengl - Public Domain
Possart, Ernst von 1841-1921
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Kohl, Helmut, 1930-....
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Benjamin-Constant, 1845-1902
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Not identified - Public Domain
Martin, W.A.P. (William Alexander Parsons), 1827-1916
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Richards, Robert H. (Robert Hallowell), 1844-1945
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W. T. Fry - Public Domain
Middleton, T. F. (Thomas Fanshaw), 1769-1822
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Unknown -
Carr, Leland W. (Leland Walker), 1883-1969
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Pereda, José María de, 1833-1906
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Stephenson, B. C. (Benjamin Charles), -1906
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Banks, Joseph, 1743-1820
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Carré, Marguerite, 1880-1947
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Carpenter, Rolla C. (Rolla Clinton), 1852-1919
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Brown, Lee P. (Lee Patrick), 1937-