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unknown - Public Domain
MSUAHC, H. Owen Reed Papers - CC0 1.0
Rowanwindwhistler - CC BY-SA 3.0
original uploader - Public Domain
Linnean Society - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
George Grantham Bain Collection (Library of Congress) - Public Domain
? - Public Domain
anonymous - Public Domain
Dmitry Scherbie - CC BY-SA 2.0
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unknown - Public Domain
Wright, Arthur W. (Arthur Williams), 1836-1915
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MSUAHC, H. Owen Reed Papers - CC0 1.0
Reed, H. Owen, 1910-2014
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Ḳenan, ʿAmos 1927-2009
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Lemaître, Frédérick, 1800-1876
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Surian, Jean-Jacques, 1942-
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Wyczółkowski, Leon, 1852-1936
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Halmos, Paul R. (Paul Richard), 1916-2006
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Macdonald, J. H. A. (John Hay Athole), 1836-1919
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Hope, Elizabeth, Lady
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Rowanwindwhistler - CC BY-SA 3.0
Liang, Qichao, 1873-1929
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unknown - Public Domain
Benelli, Sem, 1877-1949
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Mowbray, H. Siddons (Harry Siddons), 1858-1928
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Langmann, Otto
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original uploader - Public Domain
Elliott, Sarah Barnwell, 1848-1928
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Kollontaĭ, A. (Aleksandra), 1872-1952
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Stolypin, Petr Arkadʹevich, 1862-1911
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unknown - Public Domain
Gunzburg, Nico
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Farr, Jamie, 1934-
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unknown - Public Domain
Bridges, Robert, 1844-1930
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Linnean Society - Public Domain
Strasburger, Eduard, 1844-1912
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unknown - Public Domain
Moody, Blair
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Mathew Brady Levin Corot Handy - Public Domain
Stenger, W. S. (William Shearer), 1840-1918
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Liebmann, Otto, 1840-1912
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George Grantham Bain Collection (Library of Congress) - Public Domain
Bourne, Frederick G., 1851-1919
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Ramler, Karl Wilhelm, 1725-1798
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? - Public Domain
Cabrini, Frances Xavier, Saint, 1850-1917
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anonymous - Public Domain
Rivero y Ustáriz, Mariano Eduardo de, 1798-1857
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Dmitry Scherbie - CC BY-SA 2.0
Fortune, Sonny
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Horace
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unknown - Public Domain
Seymour, Thomas H. (Thomas Hart), 1807-1868