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Martin-Luther-Universität Halle-Wittenberg - CC BY-SA 4.0
United States Navy photograph - Public Domain
Unknown (not specified); possibly from one of Eustachius' books. - Public Domain
anonymous -
Studio 15 Milano - CC BY 3.0
CC BY-SA 3.0
Mathew Brady Levin Corot Handy - Public Domain
sv - CC BY 3.0
unknown - CC BY-SA 4.0
University of California (1868-1952) -
The Vatican - Public Domain
US gov - Public Domain
The Library of Congress -
:de:Samuel Lovett Waldo - Public Domain
USG - Public Domain
Public Domain
Garagemca - CC BY-SA 4.0
unknown - Public Domain
Trevor - CC BY-SA 2.0
Unkwnown - Public Domain
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Martin-Luther-Universität Halle-Wittenberg - CC BY-SA 4.0
Zopf, Friedrich Wilhelm
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Powell, Cecil Frank
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United States Navy photograph - Public Domain
Willson, Russell, 1883-1948
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Unknown (not specified); possibly from one of Eustachius' books. - Public Domain
Eustachi, Bartolomeo, -1574
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anonymous -
Kviesis, Alberts, 1881-1944
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Studio 15 Milano - CC BY 3.0
Bianco, Remo, 1922-1988
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CC BY-SA 3.0
McCurry, Steve.
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Mathew Brady Levin Corot Handy - Public Domain
Mitchell, John H. (John Hipple), 1835-1905
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Le Chatelier, Henri, 1850-1936
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sv - CC BY 3.0
Nordström, Jockum, 1963-
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unknown - CC BY-SA 4.0
Heimlich, Henry J.
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University of California (1868-1952) -
Roemer, Elizabeth, 1929-....
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Taylor, Robert, Sir, 1714-1788
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The Vatican - Public Domain
Ritter, Joseph, 1892-1967
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US gov - Public Domain
Thurman, Karen L. (Karen Loveland), 1951-
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The Library of Congress -
Hutton, Marion
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:de:Samuel Lovett Waldo - Public Domain
Nettleton, Asahel, 1783-1844
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USG - Public Domain
Russell, Frederick F. (Frederick Fuller), 1870-1960
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Public Domain
Geyer, Henry S. (Henry Sheffie), 1790-1859
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Garagemca - CC BY-SA 4.0
Adjaye, David, 1966-....
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unknown - Public Domain
Kingsford-Smith, Charles Edward, Sir, 1897-1935
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Trevor - CC BY-SA 2.0
Plaskett, Joel, 1975-
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Palme, Olof, 1927-1986
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Walker, Francis, 1764-1806
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Morris, Errol
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unknown - Public Domain
Ramsaye, Terry, 1885-1954
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Disraeli, Benjamin, 1804-1881
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Unkwnown - Public Domain
Dessoir, Max, 1867-1947
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G., Warren
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unknown - Public Domain
Kennedy, John S. (John Stewart), 1830-1909