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Phil Cooke, photographer Steve Anderson - CC BY-SA 3.0
u -
Harris & Ewing, photographer - Public Domain
Wolfgang Wesener - CC BY-SA 4.0
unknown - Public Domain
"Photograph courtesy of United States Steel Corporation". The company was the sponsor of the program. - Public Domain
Jmabel -
Hinnk - CC BY-SA 3.0
Charles Bridges - Public Domain
original uploader -
Duncan Rawlinson - CC BY-SA 2.0
Unknown U.S. Government employee or someone working at the behest of the government. - Public Domain
Michael Ignatieff - CC BY 2.0
Neworleans1944 - CC BY-SA 4.0
Gloverpark - CC BY-SA 4.0
Public Domain
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Phil Cooke, photographer Steve Anderson - CC BY-SA 3.0
Cooke, Phil, 1954-
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Dickinson, Willoughby
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Bachelard, Gaston, 1884-1962
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u -
Dès, Henri 1940-
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Harris & Ewing, photographer - Public Domain
Dyer, Leonidas Carstarphen, 1871-1957
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Schott, Otto, 1851-1935
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Alarcón, Pedro António de, 1833-1891
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Wolfgang Wesener - CC BY-SA 4.0
Shepherd, Kate, 1961-....
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unknown - Public Domain
Bentzon, Th., 1840-1907
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"Photograph courtesy of United States Steel Corporation". The company was the sponsor of the program. - Public Domain
Kiley, Richard
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Huéscar, Fernando de Silva Alvarez de Toledo y Haro, duque de, 1714-1776
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Jmabel -
Roth, Michael S., 1957-....
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Hinnk - CC BY-SA 3.0
Dorsky, Nathaniel
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Charles Bridges - Public Domain
Blair, James, 1656-1743
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Quarles, Francis, 1592-1644
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original uploader -
Cleland, John Burton, 1878-1971
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Duncan Rawlinson - CC BY-SA 2.0
Jenner, Bruce, 1949-
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unknown - Public Domain
Encke, Johann Franz, 1791-1865
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Veltman, Martinus
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Unknown U.S. Government employee or someone working at the behest of the government. - Public Domain
Williams, George Howard, 1871-1963
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Chartran, Théobald, 1849-1907
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Neustein, Joshua, 1940-....
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Baird, Tadeusz
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Michael Ignatieff - CC BY 2.0
Brown, Bonnie, 1941-
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Neworleans1944 - CC BY-SA 4.0
Rodrigue, George
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unknown - Public Domain
Elliott, Elizabeth Shippen Green
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unknown - Public Domain
Schindler, Oskar, 1908-1974
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Gloverpark - CC BY-SA 4.0
Labino, Dominick, 1910-1987
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Durham, John George Lambton, Earl of, 1792-1840
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Public Domain
Ward, Artemus, 1834-1867