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US gov - Public Domain
Sergejpinka - Public Domain
Samuel Masury - Public Domain
Joel Rickenbach - CC BY-SA 2.0
:en:John Gilmary Shea - Public Domain
unknown - Public Domain
Unknown - Public Domain
Jan Vilímek - Public Domain
Nightscream - CC BY 3.0
Maurice-Louis Branger - Public Domain
Public Domain
Thaler - CC BY-SA 3.0
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US gov - Public Domain
Anderson, Robert B. (Robert Bernerd), 1910-1989
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Zwigoff, Terry
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Zaharoff, Basil, Sir, 1850-1936
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Boudinot, Elias, 1802-1839
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Miró, Joan, 1893-1983
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Mazur, Joseph
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Ruisdael, Jacob van, 1628 or 1629-1682
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Ludlow, Louis, 1873-1950
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Sergejpinka - Public Domain
Glass, Gene V., 1940-....
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Samuel Masury - Public Domain
Clayton, Frances Louisa, approximately 1830-
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Joel Rickenbach - CC BY-SA 2.0
Hicks, Catherine, 1951-
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Doe, John, 1954-
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Locke, Elsie, 1912-2001
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Retzius, Gustaf, 1842-1919
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:en:John Gilmary Shea - Public Domain
Mora, Francis, 1827-1905
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unknown - Public Domain
Elwes, Henry John, 1846-1922
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unknown - Public Domain
Leo, Leonardo
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Hlobil, Emil, 1901-1987
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Dmitrīev, Ivan Ivanovich, 1760-1837
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Unknown - Public Domain
Cohan, George M.
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Jan Vilímek - Public Domain
Klička, Josef, 1855-1937
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Nightscream - CC BY 3.0
Portacio, Whilce
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unknown - Public Domain
Sharman, Bill, 1926-2013
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Maurice-Louis Branger - Public Domain
Maindron, Maurice, 1857-1911
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Public Domain
Bradshaw, Terry
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Inness, George, 1825-1894
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McWherter, Ned R., 1930-2011
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unknown - Public Domain
Fortuny, Mariano, 1871-1949
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Thaler - CC BY-SA 3.0
Jackiw, Roman W.
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Laugel, Auguste, 1830-1914