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Karl Gottfried Brunotte -
Sirab - CC BY-SA 2.0
PhilipRomanoPhoto - CC BY-SA 4.0
haade - CC BY-SA 2.5
unknown - Public Domain
original uploader -
Barrett, Albert M. - Public Domain
Thomas D. McAvoy (d. 1966) - Public Domain
Onehandclapping - CC BY-SA 3.0
Carl Lender - CC BY-SA 3.0
National Science Foundation - Public Domain
Lothar Wolleh - CC BY-SA 3.0
Ian Diz edmoc - CC BY-SA 4.0
Stagebill - Public Domain
The Neale Company (Washington, DC), publisher. - Public Domain
Frank P. Milburn, as scanned by the University of North Carolina - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
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Karl Gottfried Brunotte -
Brunotte, Karl Gottfried, 1958-
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Sirab - CC BY-SA 2.0
Singh, Tarsem
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Weaver, Pat, 1908-2002
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Kinney, William B. (William Burnet), 1799-1880
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PhilipRomanoPhoto - CC BY-SA 4.0
Stine, R. L., 1943-
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haade - CC BY-SA 2.5
Oliphant, Mark, 1901-2000
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unknown - Public Domain
Lillie, Frank Rattray, 1870-1947
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Takagi, Kanehiro, 1849-1920
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original uploader -
Atkins, Tom, 1935-
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Anstruther, Henry Torrens, 1860-1926
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Barrett, Albert M. - Public Domain
Southard, Elmer Ernest, 1876-1920
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Thomas D. McAvoy (d. 1966) - Public Domain
Mydans, Carl
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Onehandclapping - CC BY-SA 3.0
Raworth, Tom
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Diller, Barry
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Ray, Allene, 1901-1979
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Clark, A. P. (Albert Patton), 1913-2010
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Gendall, John, 1789-1865
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Carl Lender - CC BY-SA 3.0
Mason, Jackie
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National Science Foundation - Public Domain
Golden, William T., 1909-2007
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unknown - Public Domain
Aldrich, Henry, 1647-1710
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Lothar Wolleh - CC BY-SA 3.0
Delaunay, Sonia
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Ian Diz edmoc - CC BY-SA 4.0
White, Chris, 1936-
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Hammer, William Cicero, 1865-1930
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Stagebill - Public Domain
Dowling, Eddie
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The Neale Company (Washington, DC), publisher. - Public Domain
Zenor, William T. (William Tayor), 1846-1916
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Frank P. Milburn, as scanned by the University of North Carolina - Public Domain
Milburn, Frank Pierce
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Nash, Charles Warren, 1864-1948
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McGoohan, Patrick, 1928-2009
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Mathew Brady Levin Corot Handy - Public Domain
Howe, Timothy O. (Timothy Otis), 1816-1883
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unknown - Public Domain
Dodge, Mary Mapes, 1830-1905