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unknown - Public Domain
US Government Printing Office - Public Domain
Dr. Georges Ware - CC BY-SA 3.0
not mentioned - Public Domain
Mhermance - Public Domain
Moretto da Brescia - Public Domain
Philippe Brizard - CC BY-SA 3.0
Louisa Dedalus - CC BY-SA 4.0
Agence Meurisse, 1926, public domain - Public Domain
Slowking -
Ammi Phillips (1788-1865) - Public Domain
Chest7 - CC BY 3.0
Juan Lovera - Public Domain
Photo by Maurice Seymour, Chicago. - Public Domain
Acevedoo - Public Domain
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unknown - Public Domain
Gillen, F. J. (Francis James), 1855-1912
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Seferis, George, 1900-1971
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Edeson, Robert, 1868-1931
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unknown - Public Domain
Malan, César, 1787-1864
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Schuster, Joseph, 1748-1812
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unknown - Public Domain
Compson, Betty, 1897-1974
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US Government Printing Office - Public Domain
Deane, Charles Bennett, 1898-1969
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Pidgeon, Walter, 1897-1984
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Blake, Gordon A. (Gordon Aylesworth), 1910-1997
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Dr. Georges Ware - CC BY-SA 3.0
Bigger, J. W. (Joseph Warwick), 1891-1951
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not mentioned - Public Domain
Deslandres, Henri Alexandre, 1853-1948
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Mhermance - Public Domain
Rust, Val Dean
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Moretto da Brescia - Public Domain
Mattioli, Pietro Andrea, 1501-1577
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Hell, Miksa, 1720-1792
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Mulholland, St. Clair A. (St. Clair Augustin), 1839-1910
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Philippe Brizard - CC BY-SA 3.0
Chilton, Alex
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Coffelt, Leslie (Leslie William), 1910-1950
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Friedel, Charles, 1832-1899
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Losey, Joseph
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Louisa Dedalus - CC BY-SA 4.0
Adams, John Luther, 1953-
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Agence Meurisse, 1926, public domain - Public Domain
Picard, Émile, 1856-1941
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Slowking -
Peabody, Richard, 1951-
Image from Wikimedia Commons
Ammi Phillips (1788-1865) - Public Domain
Russell, Jeremiah, 1786-1867
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Chest7 - CC BY 3.0
Atchugarry, Pablo, 1954-....
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Juan Lovera - Public Domain
Lovera, Juan, 1776-1841
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Crozat, Antoine, marquis du Châtel, 1655-1738
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Chytilová, Věra, 1929-2014
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Photo by Maurice Seymour, Chicago. - Public Domain
Stockwell, Harry
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Acevedoo - Public Domain
Ruiz de Burton, María Amparo, 1832-1895
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Zerhouni, Elias A.