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The Notman Photographic Co., Boston - Public Domain
Towpilot -
The University of Rochester - Public Domain
... - Public Domain
unknown -
unknown - Public Domain
user at project -
Universal Studios - Public Domain
Mssemantics - CC BY 4.0
https://www.flickr.com/photos/urbanmixer/ - CC BY-SA 2.0
GrzegorzPetka - Public Domain
Chemical Institute of America - Public Domain
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Kostabi, Mark, 1960-....
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Scheffer, Ary, 1795-1858
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Mulier, Pieter, 1637-1701
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The Notman Photographic Co., Boston - Public Domain
Towle, George M. (George Makepeace), 1841-1893
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Morais, Prudente de
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Towpilot -
Pakula, Alan J., 1928-1998
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The University of Rochester - Public Domain
Wallis, W. Allen (Wilson Allen), 1912-
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Soulary, Joséphin 1815-1891
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... - Public Domain
Bentham, Samuel, 1757-1831
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unknown -
Miller, Henry William, 1807-1885
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Ligachev, E. K. (Egor Kuzʹmich)
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unknown - Public Domain
Ralfs, John
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Opie, Julian, 1958-....
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Universal Studios - Public Domain
Ferguson, Al, 1888-1971
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Pope, J. H. (John Henry), 1824-1889
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Buckingham, Humphrey Stafford, Duke of, 1402-1460
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Mssemantics - CC BY 4.0
Hochschild, Arlie Russell, 1940-....
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https://www.flickr.com/photos/urbanmixer/ - CC BY-SA 2.0
Parker, Molly, 1972-
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Lavelle, John D., 1916-1979
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GrzegorzPetka - Public Domain
Petelski, Czesław, 1922-1996
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Flanders, Laura
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Chemical Institute of America - Public Domain
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940
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Luce, Henry Winters, 1868-1941
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Yogananda, paramahansa, 1893-1952
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Ruffalo, Mark
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Keller, Albert von 1844-1920
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unknown - Public Domain
Fenn, George Manville, 1831-1909
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Sheldon, Mary French, 1847-1936
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Vecchietta, c. 1412-1480
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Semper, Gottfried, 1803-1879