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Joel Singer - CC BY-SA 3.0
U.S. Government Printing Office - Public Domain
Original uploader was Brian0918 - Public Domain
Msanders nti - CC BY-SA 4.0
Public Domain
Wilfred E. Richard - CC BY 4.0
Churchman Company - Public Domain
Ludwik Szacinski (the firm) - CC BY-SA 3.0
unknown - Public Domain
NBC Television - Public Domain
Laut, Agnes C. (Agnes Christina) -
Peter Reginato - CC BY-SA 4.0
US Government Printing Office - Public Domain
Foto Villani - Public Domain
Friedrich Brandseph - Public Domain
Donald A. B. Lindberg, M.D - Public Domain
Achille Devéria - Public Domain
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Joel Singer - CC BY-SA 3.0
Broughton, James, 1913-1999
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U.S. Government Printing Office - Public Domain
Oliver, James C. (James Churchill), 1895-1986
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Strand, Paul, 1890-1976
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Original uploader was Brian0918 - Public Domain
Bigler, William, 1814-1880
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Msanders nti - CC BY-SA 4.0
Rusk, Howard A., 1901-1989
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Public Domain
Burns, William Chalmers, 1815-1868
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Wilfred E. Richard - CC BY 4.0
Fitzhugh, William W., 1943-....
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Weizsäcker, Ernst, Freiherr von, 1882-1951
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Churchman Company - Public Domain
Johnston, James Steptoe, 1843-1924
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Ludwik Szacinski (the firm) - CC BY-SA 3.0
Haarklou, Johannes, 1847-1925
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Williamson, William, 1875-1972
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unknown - Public Domain
Spare, Austin Osman, 1886-1956
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NBC Television - Public Domain
Rigg, Diana
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Laut, Agnes C. (Agnes Christina) -
Monckton, Robert, 1726-1782
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Brendel, El, 1891-1964
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Public Domain
Fairbanks, Horace, 1820-1888
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unknown - Public Domain
Smith, Arthur D. Howden (Arthur Douglas Howden), 1887-1945
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Peter Reginato - CC BY-SA 4.0
Reginato, Peter, 1945-
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Necker, Suzanne Curchod, 1739-1794
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US Government Printing Office - Public Domain
Jonas, Charles R. (Charles Raper), 1904-1988
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Foto Villani - Public Domain
Petrella, Clara, 1914-1987
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Fisher, David, 1794-1886
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unknown - Public Domain
Morel Campos, Juan, 1857-1896
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Hickman, Howard, 1880-1949
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Friedrich Brandseph - Public Domain
Pfau, Ludwig, 1821-1894
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Donald A. B. Lindberg, M.D - Public Domain
Alexander, Virginia Margaret, 1900-1949
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Prevost, George, 1767-1816
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Achille Devéria - Public Domain
Devéria, Achille, 1800-1857
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Schoonmaker, Thelma.
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McHenry, John G. (John Geiser), 1868-1912