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kassyny - Public Domain
Generalitat de Catalunya, Departament de la Presidència -
Max Fenichel - Public Domain
Baszoetekouw - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
Saturnino Herrán - Public Domain
Abram M. Brazer - Public Domain
Public Domain
Gage Skidmore - CC BY-SA 3.0
Unknown - Public Domain
unknown - Public Domain
GilPe - CC BY-SA 4.0
Elcapastor - CC BY-SA 3.0
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kassyny - Public Domain
Laurents, Arthur.
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Generalitat de Catalunya, Departament de la Presidència -
Sert, José Luis (1902-1983).
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Max Fenichel - Public Domain
Grünwald, Max 1871-1953
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Baszoetekouw - Public Domain
Minnaert, M. G. J. (Marcel Gilles Jozef), 1893-1970
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Mathew Brady Levin Corot Handy - Public Domain
Ransom, Matt W. (Matt Whitaker), 1826-1904
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Fürstenau, Moritz, 1824-1889
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Moore, Alan, 1953-....
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Chajes, Hirsch Perez, 1876-1927
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Saturnino Herrán - Public Domain
Herrán, Saturnino, 1887-1918
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Brown, Jesse, 1944-2002
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Snedden, Billy, Sir, 1926-1987
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Lunacharsky, Anatoly Vasilievich, 1875-1933
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Abram M. Brazer - Public Domain
Leḳerṭ, Hirsh, 1879-1902
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Public Domain
Taylor, Lucy Hobbs
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Paulhan, Jean, 1884-1968
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Pitcairn, David, 1749-1809
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Gage Skidmore - CC BY-SA 3.0
Groening, Matt
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Regoyos, Darío de, 1857-1913
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Mathew Brady Levin Corot Handy - Public Domain
Hoskins, George Gilbert, 1824-1893
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Story, Nelson, 1838-1926
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Unknown - Public Domain
Butler, William Orlando, 1791-1880
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unknown - Public Domain
Singer, Isidore, 1859-1939
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Public Domain
O'Donnell, Kenneth P., 1924-1977
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Windsor, Edward, Duke of, 1894-1972
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Atkinson, George Francis, 1854-1918
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Hartung, Hans, 1904-1989
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GilPe - CC BY-SA 4.0
Bousquet, Joë
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Langlé, H. F. M. (Honoré François Marie), 1741-1807
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Elcapastor - CC BY-SA 3.0
Branch, Winston
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McGregor, Wayne, 1970-....