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photographer W(enzel) Weis (1858-1930), Wien, Landstraßer Hauptstraße 67 - Public Domain
R. Herndon Company - Public Domain
Uvafis - CC BY-SA 4.0
unknown - Public Domain
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original uploader - Public Domain
Mark Neyman - CC BY-SA 3.0
Aldous Huxley - Public Domain
unknown -
Philkon - Public Domain
Johnstone O'Shannessy & Co - Public Domain
Kirasanivanov - CC BY-SA 4.0
Kristin Headlam - CC BY 3.0
AnatolyPm - CC BY-SA 3.0
Wilhelm Fechner - Public Domain
Wilson, James Grant, 1832-1914; Fiske, John, 1842-1901; Dick, Charles, 1858-; Homans, James Edward, 1865- - Public Domain
Clement A. Lounsberry, author. Liberty Press (New York, NY), publisher. - Public Domain
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photographer W(enzel) Weis (1858-1930), Wien, Landstraßer Hauptstraße 67 - Public Domain
Walter, Bruno, 1876-1962
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R. Herndon Company - Public Domain
Davies, Thomas F. (Thomas Frederick), 1831-1905
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Alvear, Marcelo Torcuato de, 1868-1942
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Uvafis - CC BY-SA 4.0
Hooykaas, Else Madelon
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Marshall, Louis, 1856-1929
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unknown - Public Domain
Larionov, Mikhail Fedorovich, 1881-1964
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White, Kevin H.
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Tillotson, John, 1630-1694
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Lindenthal, Gustav, 1850-1935
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Mark Neyman - CC BY-SA 3.0
Laʼu, Binyamin
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Benvenuti, Alessandro
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Aldous Huxley - Public Domain
Rhine, J. B. (Joseph Banks), 1895-1980
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unknown -
Delsarte, Jean
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Zimmerman, A. A. (Arthur August), 1869-1936
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Philkon - Public Domain
Feinstein, Michael
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Johnstone O'Shannessy & Co - Public Domain
Chevalier, N. (Nicholas), 1828-1902
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Burns, Edward, 1968-....
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Rivarol, Antoine, 1753-1801
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Kirasanivanov - CC BY-SA 4.0
Hirschhorn, Thomas
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Arnauld, d'Andilly, Robert, 1588-1674
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Kristin Headlam - CC BY 3.0
Wallace-Crabbe, Chris
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AnatolyPm - CC BY-SA 3.0
Taylor, Melvin 1959-....
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Vincent, Strong, 1837-1863
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Wilhelm Fechner - Public Domain
Scheerbart, Paul, 1863-1915
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Freer, Eleanor Everest
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unknown - Public Domain
Ross, Martin, 1862-1915
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Montanari, Geminiano, 1633-1687
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Wilson, James Grant, 1832-1914; Fiske, John, 1842-1901; Dick, Charles, 1858-; Homans, James Edward, 1865- - Public Domain
Hartzell, Joseph C. (Joseph Crane), 1842-1929
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Gedda, Nicolai
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Clement A. Lounsberry, author. Liberty Press (New York, NY), publisher. - Public Domain
Burleigh, Walter A. (Walter Atwood), 1820-1896