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Dan Harasymchuk - CC BY-SA 4.0
G.B.I. Colombo - Public Domain
Mrjeffmcc - CC BY-SA 4.0
U.S. Library of Congress - Public Domain
Hubert von Herkomer - Public Domain
"Prof. Alfieri" (presumably Nereo Alfieri) - CC BY-SA 4.0
Josef Mukařovský - Public Domain
Public Domain
Special Collections & University Archives at :en:Cal Poly Pomona University Library - CC BY-SA 3.0
Dnadr - CC BY-SA 3.0
user at project - CC BY-SA 2.5
Bain News Service (George Grantham Bain collection) - Public Domain
Carl Bohnen (1872-1951) - Public Domain
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Bolton, John R.
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Purcell, Henry, 1659-1695
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Dan Harasymchuk - CC BY-SA 4.0
Metcalf, John, 1938-....
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G.B.I. Colombo - Public Domain
Fiorillo, Ignazio, 1715-1787
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Fantin-Latour, Henri, 1836-1904
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Banvard, John, 1815-1891
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Stevens, William Bacon, 1815-1887
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Dyson, Jeremiah, 1722-1776
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Mrjeffmcc - CC BY-SA 4.0
McCracken, Robert J. (Robert James), 1904-1973
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U.S. Library of Congress - Public Domain
Rogers, Will, 1911-1993
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Hubert von Herkomer - Public Domain
Zimmern, Helen, 1846-1934
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"Prof. Alfieri" (presumably Nereo Alfieri) - CC BY-SA 4.0
Beazley, J. D. (John Davidson), 1885-1970
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Josef Mukařovský - Public Domain
Zajc, Ivan, 1832-1914
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Public Domain
Cox, Palmer, 1840-1924
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Special Collections & University Archives at :en:Cal Poly Pomona University Library - CC BY-SA 3.0
Kellogg, W. K. (Will Keith), 1860-1951
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Public Domain
Copeland, Royal S. (Royal Samuel), 1868-1938
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Dnadr - CC BY-SA 3.0
Friedberg, Errol C.
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user at project - CC BY-SA 2.5
Tomšič-Srebotnjak, Dubravka, 1940-
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Bain News Service (George Grantham Bain collection) - Public Domain
Cassidy, Joseph, 1866?-1920
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Bruegel, Pieter, approximately 1525-1569
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Marie, Mecene
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Johns, Charley
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Crookshank, Edgar M. (Edgar March), 1858-1928
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Avenol, Joseph, 1879-1952
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Sharp, William, 1855-1905
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Maclean, A. K. (Alexander Kenneth), 1869-1942
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Laffoon, Ruby, 1869-1941
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Catlett, Sid, 1910-1951
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Gafencu, Grigore, 1892-1957
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Carl Bohnen (1872-1951) - Public Domain
Petersen, Hjalmar, 1890-1968