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The Rochester Athenæum and Mechanics Institute - Public Domain
Gage Skidmore - CC BY-SA 3.0
unknown - Public Domain
Vladimir Grebnev / Владимир Гребнев -
Mathew Brady Levin Corot Handy - Public Domain
US Govermnent - Public Domain
Warren K. Leffler, U.S. News & World Report Magazine; Restored by Adam Cuerden - Public Domain
zeitgenössischer Stecher, 1580 - Public Domain
Mzony - CC BY-SA 3.0
Photographer(s) unknown / not credited -
Kingkongphoto & www.celebrity-photos.com - CC BY-SA 2.0
Julius Giere - Public Domain
Menage - CC BY-SA 3.0
Vilhjalmur Stefansson photographer unknown, most likely Stefansson or George H Wilkins - Public Domain
Igbochild - CC BY 3.0
Image from Wikimedia Commons
The Rochester Athenæum and Mechanics Institute - Public Domain
Barker, James Francis, 1871-1950
Image from Wikimedia Commons
Gage Skidmore - CC BY-SA 3.0
Van Dyke, Dick, 1925-
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unknown - Public Domain
Hill, David B. (David Bennett), 1843-1910
Image from Wikimedia Commons
Vladimir Grebnev / Владимир Гребнев -
Litvinov, M. M. (Maksim Maksimovich), 1876-1951
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Mathew Brady Levin Corot Handy - Public Domain
Sawyer, Philetus, 1816-1900
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Kentish, John
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Low, Sampson, 1797-1886
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US Govermnent - Public Domain
Thompson, Llewellyn, 1904-1972
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Warren K. Leffler, U.S. News & World Report Magazine; Restored by Adam Cuerden - Public Domain
Hamer, Fannie Lou, 1917-1977
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zeitgenössischer Stecher, 1580 - Public Domain
Surius, Laurentius, 1522-1578
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Bohr, Aage.
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Elliott, Maud Howe, 1854-1948
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Mzony - CC BY-SA 3.0
Stevens, Thomas, 1938-
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Photographer(s) unknown / not credited -
Oosterzee, Cornélie van 1863-1943
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Kingkongphoto & www.celebrity-photos.com - CC BY-SA 2.0
Puente, Tito
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Beveridge, Albert J. (Albert Jeremiah), 1862-1927
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Moszkowski, Moritz, 1854-1925
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Julius Giere - Public Domain
Sertürner, Friedrich Wilhelm 1783-1841
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Wolcott, Edward Oliver, 1848-1905
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Bordogni, Marco, 1789-1856
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Troward, T. (Thomas), 1847-1916
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unknown - Public Domain
Oldham, Thomas, 1816-1878
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Menage - CC BY-SA 3.0
Alonso, Dámaso, 1898-1990
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Macadam, Ivison S. (Ivison Stevenson), 1894-1974
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Thomson, James, 1786-1849
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Vilhjalmur Stefansson photographer unknown, most likely Stefansson or George H Wilkins - Public Domain
Anderson, Rudolph Martin, 1876-
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Deming, W. Edwards (William Edwards), 1900-1993
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Shinn, Everett, 1876-1953
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Igbochild - CC BY 3.0
Smith, Ernie
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Rees, Charles W. (Charles Wayne)