Image from Wikimedia Commons
Paul Katzenberger - CC BY-SA 3.0
unknown - Public Domain
Hpschaefer - CC BY-SA 3.0
Gustav Brühl, Cincinnati - Public Domain
Anonymous - Public Domain
Harris & Ewing - Public Domain
user at project - CC BY 2.5
Erling Mandelmann - CC BY-SA 3.0
Public Domain
Photograph by Benjamin Couprie, Institut International de Physique Solvay, Brussels, Belgium - Public Domain
Unknown; subject died in 1918 - Public Domain
Unbekannter Grafiker der Epoche. - Public Domain
Unknown military photographer - Public Domain
Columbia Records - Public Domain
... - Public Domain
J. Carpenter - Public Domain
:de:Benutzer:Bernd Schwabe in Hannover - CC BY-SA 4.0
Image from Wikimedia Commons
Paul Katzenberger - CC BY-SA 3.0
Kelemen, Fred, 1964-....
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unknown - Public Domain
Bigge, John Thomas, 1780-1843
Image from Wikimedia Commons
Hpschaefer - CC BY-SA 3.0
Stewart, Paul, 1955-....
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Gustav Brühl, Cincinnati - Public Domain
Brühl, Gustav 1826-1903
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Anonymous - Public Domain
Borden, Lizzie, 1860-1927
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Rancé, Armand Jean Le Bouthillier de, 1626-1700
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Harris & Ewing - Public Domain
Gama, Domício da, 1862-1925
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Barton, Bruce, 1886-1967
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user at project - CC BY 2.5
Ahern, Bertie, 1951-....
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Leake, Lafayette
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Erling Mandelmann - CC BY-SA 3.0
Dutoit, Charles
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Mitchell, P. Chalmers (Peter Chalmers), Sir, 1864-1945
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Public Domain
Whiting, William, 1813-1873
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Gross, Ernest A. (Ernest Arnold), 1906-1999
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Cremer, Fritz, 1906-1993
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Photograph by Benjamin Couprie, Institut International de Physique Solvay, Brussels, Belgium - Public Domain
Guye, Charles Eugène 1866-
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Crowder, E. H. (Enoch Herbert), 1859-1932
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Urspruch, Anton, 1850-1907
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Hoepner, Erich
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Unknown; subject died in 1918 - Public Domain
Mitchell, John Ames, 1845-1918
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Unbekannter Grafiker der Epoche. - Public Domain
Lothar, Rudolph, 1865-1943
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Unknown military photographer - Public Domain
Keyes, Geoffrey, 1888-1967
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Columbia Records - Public Domain
Smith, Carl, 1927-2010
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McRae, Carmen
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unknown - Public Domain
Fesca, Alexander, 1820-1849
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... - Public Domain
Bentham, Samuel, 1757-1831
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J. Carpenter - Public Domain
Martin, W. (William), 1807?-1880
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Ortego, Francisco, 1833-1881
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Grosswald, Emil.
Image from Wikimedia Commons
:de:Benutzer:Bernd Schwabe in Hannover - CC BY-SA 4.0
Spengler, Andreas