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US Government Printing Office (Washington, DC). - Public Domain
Bain News Service, publisher - Public Domain
Georg Brokesch - Public Domain
ServiceAT - CC BY-SA 3.0
Daniel Steele Durrie (1819-1892) - Public Domain
unknown - Public Domain
Cephas Thompson - Public Domain
FrankieF - CC BY-SA 4.0
Mattymoo0 - CC BY-SA 3.0
anonymous - Public Domain
Greg Hernandez at https://www.flickr.com/photos/greginhollywood/ - CC BY 2.0
Bureau of Industrial Service - Public Domain
Charles Mallison - CC BY-SA 3.0
XIII - CC BY-SA 3.0
Photo by Rio V. De Sieux - Public Domain
South Dakota State Historical Society - Public Domain
François Alquier - CC BY-SA 3.0
Harris & Ewing photographer - Public Domain
Ugo Ponte onl - CC BY-SA 2.0
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US Government Printing Office (Washington, DC). - Public Domain
Beamer, John V. (John Valentine), 1896-1964
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Bain News Service, publisher - Public Domain
Kreisler, Fritz
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Georg Brokesch - Public Domain
Windscheid, Bernhard, 1817-1892
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ServiceAT - CC BY-SA 3.0
Green, Cecil Howard, 1900-2003
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Hyde, Thomas, 1636-1703
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Bergasse, Nicolas, 1750-1832
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Potter, Henry, 1766-1857
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Bowers, Henry Robertson, 1883-1912
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Daniel Steele Durrie (1819-1892) - Public Domain
Catlin, John, 1803-1874
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unknown - Public Domain
Drayton, Thomas, 1808-1891
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Cephas Thompson - Public Domain
Dick, Elisha Cullen, 1762-1825
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Pitati, Bonifacio de', 1487-1553
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Anshutz, Thomas Pollock, 1851-1912
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Ponsonby, John, 1713-1789
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FrankieF - CC BY-SA 4.0
Pollak, Kay, 1938-....
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Mattymoo0 - CC BY-SA 3.0
Gallagher, Mike
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unknown - Public Domain
Cruz-Coke, Eduardo
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anonymous - Public Domain
Lieber, Lillian R. (Lillian Rosanoff), 1886-1986
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Stoeckel, Gustav Jakob, 1819-1907
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Greg Hernandez at https://www.flickr.com/photos/greginhollywood/ - CC BY 2.0
Dussault, Nancy
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Bureau of Industrial Service - Public Domain
Verdon, Gwen
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Charles Mallison - CC BY-SA 3.0
Métraux, Alfred, 1902-1963
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XIII - CC BY-SA 3.0
Du Perron, Jacques Davy, 1556-1618
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Photo by Rio V. De Sieux - Public Domain
Yuan, Shikai, 1859-1916
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South Dakota State Historical Society - Public Domain
Leavenworth, Henry, 1783-1834
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François Alquier - CC BY-SA 3.0
Genest, Véronique, 1956-....
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Harris & Ewing photographer - Public Domain
Arnold, Thurman Wesley, 1891-1969
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Ugo Ponte onl - CC BY-SA 2.0
Casadesus, Jean-Claude, 1935-....
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Radev, Simeon, 1879-1967
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unknown - Public Domain
Herrmann, Alexander, 1843-1896