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Hammondite - CC BY 3.0
nvt - Public Domain
Ufo Snake - CC BY-SA 3.0
unknown - Public Domain
gdcgraphics - CC BY-SA 2.0
Radcliffe College - Public Domain
unknown Photograf - Public Domain
Nightscream - CC BY 3.0
TheGrayLion - CC BY-SA 4.0
EVula - CC BY-SA 4.0
Photographed by Gibson Art Galleries - Public Domain
Jean Michel Moreau - Public Domain
Estate of Laurie Walker/ Susan Hobbs Gallery - CC BY-SA 3.0
Oak Ridge National Laboratory - Public Domain
Arnold Genthé - Public Domain
Herbert Lambert (1881-1936) - Public Domain
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Young, Brigham, 1836-1903
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Hammondite - CC BY 3.0
Smith, Jimmy
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Juxon, William, 1582-1663
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nvt - Public Domain
Andriessen, Willem, 1887-1964
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Ufo Snake - CC BY-SA 3.0
Brown, Clifford
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Burns, Robert, 1869-1941
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Force, Juliana, 1876-1948
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unknown - Public Domain
Timerman, Jacobo, 1923-
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gdcgraphics - CC BY-SA 2.0
Bening, Annette
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Konopiński, Emil Jan (1911- ).
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Yvon, Adolphe, 1817-1893
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unknown - Public Domain
Hansen, G. Armauer (Gerhard Armauer), 1841-1912
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Courteline, Georges, pseud.
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Radcliffe College - Public Domain
Hundley, Mary Gibson, 1897-1986
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unknown Photograf - Public Domain
Roché, Henri-Pierre, 1879-1959
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Mitchell, P. (Peter), 1824-1899
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Nightscream - CC BY 3.0
Hasen, Irwin, 1918-
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Deml, Jakub, 1878-1961
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Jones, Connie, 1934-
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TheGrayLion - CC BY-SA 4.0
Fox, Frederick, 1931-2011
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Johnson, Royal C. (Royal Cleaves), 1882-1939
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EVula - CC BY-SA 4.0
Shores, Del
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Photographed by Gibson Art Galleries - Public Domain
Harper, William Rainey, 1856-1906
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Lyon, Isabel, 1863-1958
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Jean Michel Moreau - Public Domain
Raucourt, Mlle., 1756-1815
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Estate of Laurie Walker/ Susan Hobbs Gallery - CC BY-SA 3.0
Walker, Laura, 1960-
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Oak Ridge National Laboratory - Public Domain
Thomas, Charles Allen, 1900-1982
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Arnold Genthé - Public Domain
Flaherty, Robert Joseph, 1884-1951
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Kent, William, 1685-1748
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Herbert Lambert (1881-1936) - Public Domain
Bliss, Arthur, 1891-1975