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unknown -
Brigham Young University - Public Domain
Joxerra - CC BY-SA 3.0
Smithsonian Institution -
Penale52 - CC BY-SA 3.0
Biblejohn - CC BY-SA 3.0
Public Domain
Pam Kosty - CC BY-SA 3.0
Collinjkd - CC BY-SA 3.0
William Rothenstein - Public Domain
Alvintrusty - CC BY-SA 3.0
Author Unknown - Public Domain
Unknown military photographer of the Signal Corps - Public Domain
Published by Brentano's, NY, 1922 - Public Domain
Jerseyjim53 - CC BY-SA 4.0
unknown - Public Domain
US Government Printing Office - Public Domain
Inasaridse - Public Domain
Ibigelow - CC BY-SA 3.0
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Assmann, Jan
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unknown -
Prokopovich, S. N. (Sergeĭ Nikolaevich), 1871-1955
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Brigham Young University - Public Domain
Roberts, Eugene L. (Eugene Lusk), 1880-1953
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Redwood, Theophilus
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Joxerra - CC BY-SA 3.0
Sastre, Alfonso, 1926-....
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Coca, Imogene
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Watson, James Eli, 1864-1948
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Aanrud, Hans, 1863-1953
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Smithsonian Institution -
Lober, Georg John, 1892-1961
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Fauchard, Pierre, 1678-1761.
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Mosse, Rudolf, 1843-1920
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Penale52 - CC BY-SA 3.0
Collins, Jimmy, 1870-1943
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Biblejohn - CC BY-SA 3.0
Call, John, Sir, 1732-1801
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Public Domain
Holland, W. J. (William Jacob), 1848-1932
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Pam Kosty - CC BY-SA 3.0
Mcgovern, Patrick E.
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Collinjkd - CC BY-SA 3.0
Mackin, Jeanne
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William Rothenstein - Public Domain
Vaughan Williams, Ralph, 1872-1958
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Alvintrusty - CC BY-SA 3.0
Degen, Bruce.
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Author Unknown - Public Domain
Kauder, Hugo, 1888-1972
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Hofmann, August Wilhelm von 1818-1892
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Unknown military photographer of the Signal Corps - Public Domain
Walker, Fred L. (Fred Livingood), 1887-1969
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Cochran, John Joseph, 1880-1947
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Marxsen, Eduard, 1806-1887
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Published by Brentano's, NY, 1922 - Public Domain
Tairov, Aleksandr I︠A︡kovlevich, 1885-1950
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Jerseyjim53 - CC BY-SA 4.0
Patrick, Pat
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unknown - Public Domain
Green, Samuel Swett, 1837-1918
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US Government Printing Office - Public Domain
Runnels, Harold Lowell, 1924-1980
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Inasaridse - Public Domain
Araiza, Francisco
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Ibigelow - CC BY-SA 3.0
Goldstine, Herman H. (Herman Heine), 1913-2004
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Thomas, Helen, 1920-2013