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Very trivial - CC BY-SA 3.0
Miremahe - CC BY-SA 4.0
NBC-NBC Photo. David O. Alber Associates, New York, photographer. - Public Domain
unknown - Public Domain
The Daily Graphic - Public Domain
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Photographer not mentioned at the source - CC BY 3.0
Lord Leighton - Public Domain
ELApro - CC BY-SA 4.0
USN - Public Domain
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Thalheimer, August
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Very trivial - CC BY-SA 3.0
Nytchenko, Dmytro
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Stengel, Alfred, 1868-1939
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Cooper, Emil 1877-1960
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Besenval, Pierre-Victor, baron de, 1721-1791
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Miremahe - CC BY-SA 4.0
Lazarsfeld, Paul Felix
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Grafton, Henry Fitzroy, Duke of, 1663-1690
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Stenhouse, John, 1809-1880
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Brohan, Augustine
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Catesby, Robert, 1573-1605
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NBC-NBC Photo. David O. Alber Associates, New York, photographer. - Public Domain
Stone, Ezra, 1917-1994
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unknown - Public Domain
Goulue, 1866-1929
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Smith, Joseph, 1790-1877
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The Daily Graphic - Public Domain
Fullerton, William, 1818-1900
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Massey, Douglas S.
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Photographer not mentioned at the source - CC BY 3.0
Chinmoy, šrí, 1931-2007
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Lord Leighton - Public Domain
Ross, Janet, 1842-1927
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ELApro - CC BY-SA 4.0
Ramsey, Frank Plumpton, 1903-1930
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Desboutin, Marcellin, 1823-1902
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Haglund, Ivar, 1905-1985
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Munro-Ferguson, Ronald Craufurd, Sir, 1860-1934
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unknown - Public Domain
Saha, Meghnad, 1893-1956
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USN - Public Domain
Backus, Standish, 1910-1989
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Fessenden, Reginald Aubrey, 1866-1932
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Olivetti, Camillo, 1868-1943
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Mayhew, Henry, 1812-1887
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Finch, Edward, 1664-1738
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Sforza, Carlo, conte, 1872-1952
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Diamond, Larry Jay
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Cornwell, Patricia Daniels