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unknown - Public Domain
Frank Hamilton - CC BY-SA 3.0
unknown photographer - Public Domain
Harris & Ewing, photographer - Public Domain
NASA - Public Domain
Joseph Anton Nikolaus Settegast - Public Domain
1st Lieutenant Gordon A. Stevens - Public Domain
Ferdinand Urbahns - Public Domain
Unattributed - Public Domain
Photobra -
Wm. Notman & Son - Public Domain
Lightmanalan - Public Domain
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unknown - Public Domain
Gergonne, Joseph-Diez, 1771-1859
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Frank Hamilton - CC BY-SA 3.0
Nouwen, Henri J.M.
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Förster, Emanuel Aloys, 1748-1823
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Marilhat, Prosper, 1811-1847
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unknown - Public Domain
Hackett, John, Sir, 1910-1997
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Roche, T. C.
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Werts, George T. (George Theodore), 1846-1910
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Bamberger, Simon, 1845-1926
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Lee, Gypsy Rose, 1914-1970
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unknown photographer - Public Domain
Patterson, Malcolm R. (Malcolm Rice), 1861-1935
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Harris & Ewing, photographer - Public Domain
Lawson, Alfred W. (Alfred William), 1869-1954
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NASA - Public Domain
Ceruzzi, Paul E.
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Annaud, Jean-Jacques
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Hessey, James Augustus, 1814-1892
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Joseph Anton Nikolaus Settegast - Public Domain
Görres, Joseph von, 1776-1848
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1st Lieutenant Gordon A. Stevens - Public Domain
Eichelberger, Robert L.
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Echeverría, Javier, 1797-1852
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NASA - Public Domain
Spring, Sherwood C., 1944-
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Fulton, L. W. (Lee W.), 1910-1976
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Lunceford, Jimmie
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Bates, Florence, 1888-1954
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Dürer, Albrecht, 1471-1528
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Ferdinand Urbahns - Public Domain
Tönnies, Ferdinand, 1855-1936
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Louis Bonaparte, King of Holland, 1778-1846
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Unattributed - Public Domain
Ropartz, J. Guy (Joseph Guy), 1864-1955
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Photobra -
Magic Slim, (Musician)
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Horowitz, Ryszard, 1939-
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Stuck, Franz von 1863-1928
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Wm. Notman & Son - Public Domain
Gault, Andrew Hamilton, 1882-1958
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Lightmanalan - Public Domain
Lightman, Alan P., 1948-