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Biltmore Theatre - Public Domain
Hedvig Bjerknes - CC BY-SA 4.0
Sbuckup - CC BY 3.0
user at project - Public Domain
The Göttingen Observatory photo, courtesy Hartmut Grosser. - Public Domain
Johann Jakob Balmer - Public Domain
U.S. Government Printing Office. - Public Domain
Samuel Hopkins Emery (1815-1901) - Public Domain
Langdon - Public Domain
Public Domain
anonymous - Public Domain
unknown - Public Domain
Mathew Brady - Public Domain
Photograph - Public Domain
Bixby Memorial Library Vergennes Vermont - Public Domain
unknown photographer - early 20th century - Public Domain
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Biltmore Theatre - Public Domain
Fuller, Penny
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Peters, John Andrew, 1864-1953
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Hosmer, James K. (James Kendall), 1834-1927
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Bale, John, 1495-1563
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Gendall, John, 1789-1865
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Wood, James Frederick, 1813-1883
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Hedvig Bjerknes - CC BY-SA 4.0
Bjerknes, Jakob, 1897-....
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Sbuckup - CC BY 3.0
Schlieker, Hans-Jürgen 1924-2004
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Knox, Thomas Wallace, 1835-1896
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O'Brien, Richard, 1942-....
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user at project - Public Domain
Kimathi, Dedan, 1920-1957
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The Göttingen Observatory photo, courtesy Hartmut Grosser. - Public Domain
Hertzsprung, Ejnar, 1873-1967
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Unna, Paul Gerson, 1850-1929
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Maximus, Confessor, Saint, approximately 580-662
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Trescot, William Henry, 1822-1898
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Turgenev, A. (Aleksandr), 1784-1845
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Johann Jakob Balmer - Public Domain
Balmer, Johann Jakob, 1825-1898
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U.S. Government Printing Office. - Public Domain
Merrow, Chester E.
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Samuel Hopkins Emery (1815-1901) - Public Domain
Bennett, Edmund H. (Edmund Hatch), 1824-1898
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Langdon - Public Domain
Myers, Jack Elliott, 1941-
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Public Domain
Woodworth, C. W. (Charles William), 1865-1940
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anonymous - Public Domain
Keable, Robert, 1887-1927
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Waltz, Sasha
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unknown - Public Domain
Ruffo, Fabrizio, 1744-1827
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Mathew Brady - Public Domain
Harris, Henry Richard, 1828-1909
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Photograph - Public Domain
Beecher, Charles, 1815-1900
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Barry, Marion Shepilov, 1936-2014
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Bixby Memorial Library Vergennes Vermont - Public Domain
Grandey, George W., 1813-1893
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unknown photographer - early 20th century - Public Domain
Holl, Karl, 1866-1926
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Clay, Brutus Junius, 1808-1878