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Ram.eisenberg - CC BY-SA 3.0
Mathew Brady - Public Domain
Smithsonian Institution -
unknown - Public Domain
Public Domain
unknown photographer - Public Domain
Photo from Bain News Service. - Public Domain
Bill Branson, NIH - Public Domain
Étienne Carjat - Public Domain
USAF - Public Domain
W. W. Munsell & Co. (New York, NY), publisher. - Public Domain
Th. Fink Veringen - CC BY-SA 4.0
Philippe madral - CC BY-SA 3.0
Georges Seguin (Okki - CC BY-SA 3.0
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Ram.eisenberg - CC BY-SA 3.0
Sachs, Albie, 1935-....
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Mathew Brady - Public Domain
Belknap, William Worth, 1829-1890
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Smithsonian Institution -
Bohm, Max, 1868-1923
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Reinagle, Philip, 1749-1833
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unknown - Public Domain
Yradier, Sebastián, 1809-1865
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unknown - Public Domain
Green, Samuel Swett, 1837-1918
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Uden, Lucas van, 1595-1672
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Public Domain
Chittenden, Martin, 1763-1840
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Sprague, William, 1830-1915
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Lasaulx, Ernst von 1805-1861
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Knight, John Prescott, 1803-1881
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McCarthy, Eugene J., 1916-2005
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unknown photographer - Public Domain
Sigerson, George, 1839-1925
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unknown - Public Domain
Rector, Henry M. (Henry Massey), 1816-1899
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Photo from Bain News Service. - Public Domain
Hague, Frank, 1876-1956
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Wolcott, Oliver, 1760-1833
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Schiff, Richard, 1955-
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Bill Branson, NIH - Public Domain
Collins, Francis S.
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Hardwick, Otto, 1904-1970
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Étienne Carjat - Public Domain
Braga, Gaetano, 1829-1907
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USAF - Public Domain
Whittle, Reba Z. (Reba Zitella), 1919-1981
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Stallybrass, Edward
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W. W. Munsell & Co. (New York, NY), publisher. - Public Domain
Scranton, Joseph Augustine, 1838-1908
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Th. Fink Veringen - CC BY-SA 4.0
Hermannus, Contractus, 1013-1054
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unknown - Public Domain
Neuberg, Joseph 1840-1926
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Stradella, Alessandro, 1639-1682
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Philippe madral - CC BY-SA 3.0
Lauzier, Gérard
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Nicholas, Paul, 1945-
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Georges Seguin (Okki - CC BY-SA 3.0
Christin, Pierre
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Kunze, John C. (John Christopher), 1744-1807