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Dmitrismirnov - CC BY-SA 3.0
author - Public Domain
unknown - Public Domain
United States War Department - Public Domain
Public Domain
— <b>Hunter Kahn - Public Domain
Ermell - CC BY 3.0
Joseolgon - CC BY-SA 4.0
Nancyrosenfeld - CC BY-SA 3.0
Machahn - Public Domain
Agence Meurisse -
George Grantham Bain Collection (Library of Congress) - Public Domain
Americanoperastudies - CC BY-SA 4.0
Cdonges - CC0 1.0
Published by Brentano's, NY, 1922 - Public Domain
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Horan, Walter Franklin, 1898-1966
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Dmitrismirnov - CC BY-SA 3.0
Basire, James, 1730-1802
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Morrow, William W., 1843-1929
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author - Public Domain
Doolittle, Charles Camp, 1832-1903
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unknown - Public Domain
Spada, Fabrizio, 1643-1717
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United States War Department - Public Domain
Frissell, Toni, 1907-1988
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Public Domain
Miller, Jack R. (Jack Richard), 1916-1994
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— <b>Hunter Kahn - Public Domain
Warner, Seth, 1743-1784
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Ermell - CC BY 3.0
Stein, Horst, 1928-2008
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Hatcher, Teri
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Johnston, John, 1775-1861
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Leighton, Alexander, 1568-1649
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Joseolgon - CC BY-SA 4.0
Menezes, Aleixo de, 1559-1617
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Mackarness, John Fielder, 1820-1889
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Rudio, Ferdinand, 1856-1929
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Nancyrosenfeld - CC BY-SA 3.0
Johnson, Hall, 1888-1970
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Public Domain
Anderson, Nephi, 1865-1923
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Machahn - Public Domain
Heydt, August von der 1801-1874
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Agence Meurisse -
Bourdelle, Émile Antoine 1861-1929
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Hertz, Heinrich, 1857-1894
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George Grantham Bain Collection (Library of Congress) - Public Domain
Untermeyer, Louis, 1885-1977
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Kung, H. H. (Hsiang-hsi), 1880-1967
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Americanoperastudies - CC BY-SA 4.0
Rodríguez, Robert Xavier
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Biddle, Charles J. (Charles John), 1819-1873
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Cdonges - CC0 1.0
Rowles, John, 1947-
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Ross, Anthony, 1906-1955
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Vico, Enea, 1523-1567
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Published by Brentano's, NY, 1922 - Public Domain
Tairov, Aleksandr I︠A︡kovlevich, 1885-1950
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Ramis, Harold
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Malenkov, Georgiǐ Maksimilianovich, 1901-1988