Image from Wikimedia Commons
Mboix - CC BY-SA 4.0
unknown - Public Domain
Davis & Sanford - Public Domain
(To be confirmed/sehr unsicher:) Hans Schickhardt (1512-1585) - Public Domain
Okanogan Historical Society -
Brianmcmillen - CC BY 3.0
Porter Hovey at http://www.porterhovey.com/ - CC BY-SA 3.0
Xalua - Public Domain
anonymous -
Its my own edited picture - CC BY-SA 4.0
Smithsonian Institution -
Gilberto - CC BY 2.0
unknown photographer - Public Domain
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Bannerman, Margaret
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Coello, Claudio, 1642-1693
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Mboix - CC BY-SA 4.0
Pollock, Griselda
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Wolverton, Charles A. (Charles Anderson), 1880-1969
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unknown - Public Domain
Menke, Frank G. (Frank Grant), 1885-1954
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unknown - Public Domain
Hoogstraal, Harry, 1917-1986
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Davis & Sanford - Public Domain
Dryden, John F. (John Fairfield), 1839-1911
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Budiansky, Stephen.
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Danspeckgruber, Wolfgang F.
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Darby, John Fletcher, 1803-1882
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Galleghan, Frederick, Sir, 1897-1971
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(To be confirmed/sehr unsicher:) Hans Schickhardt (1512-1585) - Public Domain
Schegk, Jakob, 1511-1587
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Okanogan Historical Society -
Matsura, Frank, 1873-1913
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Edwards, Jonathan, 1703-1758
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Brianmcmillen - CC BY 3.0
Harris, Barry, 1929-
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Gordon, A. J. (Adoniram Judson), 1836-1895
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Porter Hovey at http://www.porterhovey.com/ - CC BY-SA 3.0
Bleckner, Ross, 1949-
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unknown - Public Domain
Sadleir, John, 1813-1856
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Xalua - Public Domain
Romero, Constantino
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anonymous -
Gmelin, Philipp Friedrich, 1721-1768
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Its my own edited picture - CC BY-SA 4.0
Chamberlin, Edward, 1899-1967
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Carson, David, 1948-
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Roscoe, William, 1753-1831
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Belle, Alexis-Simon, 1674-1734
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Smithsonian Institution -
Van Biesbroeck, George, 1880-1974
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Kemmer, Nicholas
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Gilberto - CC BY 2.0
Stamm, Marvin, 1939-
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Rains, Claude, 1889-1967
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unknown photographer - Public Domain
Cowen, Benjamin Rush, 1831-1908
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Soutine, Chaïm, 1893-1943