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unknown - Public Domain
Eulogia Merle - CC BY-SA 4.0
Dave Morris - CC BY 2.0
Dariusz.Biegacz -
Robert Forsyth Scott (1849-1933) -
Tobias Stimmer - Public Domain
US Government Printing Office - Public Domain
Public Domain
Masha Kuvshinova at https://www.flickr.com/photos/kuvshinova/ - CC BY 3.0
Simon Fraser University - University Communications - CC BY 2.0
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unknown - Public Domain
Weber, Heinrich, 1842-1913
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Thorpe, Richard, 1896-1991
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Platen, August, Graf von, 1796-1835
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Higgins, Frank Wayland, 1856-1907
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unknown - Public Domain
Åhrén, Uno (1897-1977).
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Hinchliffe, John, 1731-1794
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Eulogia Merle - CC BY-SA 4.0
Ayanz y Beaumont, Jerónimo de 1553-1613
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Dave Morris - CC BY 2.0
Postlethwaite, Pete
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Cassian, John, approximately 360-approximately 435
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Leonard, Sugar Ray, 1956-
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Dariusz.Biegacz -
Zamfir, Gheorghe, 1941-
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Ritchie, Donald A., 1945-....
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Turner, Kathleen, 1954-
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Robert Forsyth Scott (1849-1933) -
Scott, Robert Forsyth, 1849-1933
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Tobias Stimmer - Public Domain
Marbach, Johann, 1521-1581
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US Government Printing Office - Public Domain
Roberts, Ray, 1913-1992
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unknown - Public Domain
Royle, Vernon
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unknown - Public Domain
Martens, Fedor Fedorovich, 1845-1909
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Hudson, Frederic, 1819-1875
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unknown - Public Domain
Bigottini, Emilie
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Strozzi, Leone, -1554
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Venable, William Henry, 1836-1920
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Le Querrec, Guy
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Rosen, Pinchas, 1887-1978
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Simpson, Don, 1961-
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Public Domain
Walsh, David I. (David Ignatius), 1872-1947
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Kofoid, Charles A. (Charles Atwood), 1865-1947
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Masha Kuvshinova at https://www.flickr.com/photos/kuvshinova/ - CC BY 3.0
Pak, Chʻan-uk, 1963-
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Simon Fraser University - University Communications - CC BY 2.0
Turner, Nancy J., 1947-....
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Newcomb, Simon, 1835-1909