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Tom Beetz - CC BY 2.0
NASA - Public Domain
Prof. Mario Bunge - CC BY-SA 3.0
Andrew L.<br> - Public Domain
Uknown, Subject in the photo died on 10th October, 1862, thus more than 70 years have passed since taken. - Public Domain
Gebgdc - CC BY 3.0
Alexander Kanoldt - Public Domain
Georges Biard - CC BY-SA 3.0
see above; the author of photograph and lithographer were uncredited - Public Domain
unknown - Public Domain
steve cranston - CC BY-SA 2.0
James McNeill Whistler - Public Domain
Bain - Public Domain
Raffy Espiritu - CC BY-SA 2.0
Peter A. Juley & Son -
Agence Meurisse - Public Domain
original uploader - Public Domain
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Tom Beetz - CC BY 2.0
Smith, Wadada Leo, 1941-....
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NASA - Public Domain
Young, John, 1930-2018
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Prof. Mario Bunge - CC BY-SA 3.0
Bunge, Mario, 1919-....
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Andrew L.<br> - Public Domain
Rockefeller, William Avery, 1810-1906
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Visconti, Galeazzo, Duke of Milan, approximately 1320-1378
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Uknown, Subject in the photo died on 10th October, 1862, thus more than 70 years have passed since taken. - Public Domain
Thorp, Charles, 1783-1862
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Gebgdc - CC BY 3.0
Avery, Eric, 1965-
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Mannerheim, Carl Gustaf Emil, 1867-1951
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Toland, John, 1670-1722
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Alexander Kanoldt - Public Domain
Kanoldt, Alexander, 1881-1939
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Crawford, F. Marion (Francis Marion), 1854-1909
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Wood, James R. (James Rushmore), 1816-1882
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Schirmer, Heinrich Ernst, 1814-1887
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Tallien, Jean-Lambert, 1767-1820
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Georges Biard - CC BY-SA 3.0
Villeret, Jacques
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see above; the author of photograph and lithographer were uncredited - Public Domain
Althaus, Julius, 1833-1900
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unknown - Public Domain
Postel, Guillaume, 1510-1581
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steve cranston - CC BY-SA 2.0
Cummings, Jim, 1952-
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James McNeill Whistler - Public Domain
Key, John Ross, 1832-1920
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Christian, Hugh Cloberry, 1747-1798
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Bain - Public Domain
West, Oswald, 1873-1960
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Bochner, S. (Salomon), 1899-1982
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Raffy Espiritu - CC BY-SA 2.0
José, F. Sionil (Francisco Sionil), 1924-
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Loudoun, John Campbell, Earl of, 1705-1782
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unknown - Public Domain
Fiske, Jennie McGraw, 1840-1881
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Peter A. Juley & Son -
Burke, Selma, 1900-1995
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Roy, J. Stapleton
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Agence Meurisse - Public Domain
Cot, Pierre, 1895-1977
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Baxter, Richard, 1615-1691
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original uploader - Public Domain
Choron, Alexandre, 1771-1834