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File photo, scanned and colorized by Tim Davenport - Public Domain
unknown photographer - Public Domain
Kim Traynor - CC BY-SA 4.0
Gretchenmcc - CC BY-SA 4.0
cf - Public Domain
Cybjorg - CC BY-SA 3.0
Public Domain
Mathew Brady - Public Domain
unknown - Public Domain
original uploader - Public Domain
Fradelle and Young/UK Government - Public Domain
George Grantham Bain Collection (Library of Congress) - Public Domain
Center for the Study of The Great Ideas -
General Motors Corporation, sponsor of the symphony orchestra he conducted. - Public Domain
Meyere de, Jan - Public Domain
CC BY 2.5
SP - Public Domain
Image from Wikimedia Commons
File photo, scanned and colorized by Tim Davenport - Public Domain
Browder, Earl, 1891-1973
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unknown photographer - Public Domain
Payne, John, 1815-1874
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Morrow, William W., 1843-1929
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Kim Traynor - CC BY-SA 4.0
Thompson, E.P. (Edward Palmer), 1924-1993
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Coandă, Henri 1886-1972
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Gretchenmcc - CC BY-SA 4.0
Shaw, Patricia A., 1946-
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cf - Public Domain
Laurentie, Pierre-Sébastien, 1793-1876
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Foresythe, Reginald, 1907-1958
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Upfold, George, 1796-1872
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Cybjorg - CC BY-SA 3.0
National Air and Space Museum
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Allen, Forrest C., 1885-1974
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Muraire, Honoré, 1750-1837
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Public Domain
Maclean, Donald, 1913-1983
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Novak, John, 1955-
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Saville-Kent, William, 1845-1908
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Mathew Brady - Public Domain
Willcox, Orlando B.
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unknown - Public Domain
Williams, Charles Kilborn, 1782-1853
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original uploader - Public Domain
Rodeheaver, Homer A. (Homer Alvan), 1880-1955
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Crane, Robert K.
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Astor, John Jacob, 1763-1848
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Philip I, King of Castile, 1478-1506
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Fradelle and Young/UK Government - Public Domain
Hamilton, R. Vesey (Richard Vesey), Sir, 1829-1912
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George Grantham Bain Collection (Library of Congress) - Public Domain
Frederik VIII, King of Denmark, 1843-1912
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Center for the Study of The Great Ideas -
Adler, Mortimer Jerome, 1902-2001
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unknown - Public Domain
Sharpe, Edmund, 1809-1877
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General Motors Corporation, sponsor of the symphony orchestra he conducted. - Public Domain
Rapée, Ernő 1891-1945
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unknown - Public Domain
Dougherty, Charles, 1850-1915
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Meyere de, Jan - Public Domain
Derkert, Siri, 1888-1973
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CC BY 2.5
Kosambi, D. D. (Damodar Dharmanand), 1907-1966
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SP - Public Domain
Royer, Pancrace, 1705?-1755