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Sharon - CC BY-SA 4.0
J. W. Glass - Public Domain
George Grantham Bain Collection (Library of Congress) - Public Domain
sf2000 - Public Domain
Rachael Purdy - CC BY-SA 2.0
By Lewis Clinton Strang - Public Domain
Siebbi - CC BY 3.0
unknown - Public Domain
Fleur-de-farine - CC BY-SA 4.0
NASA - Public Domain
University of Texas -
Armando Spadini - Public Domain
Unknown photographer - Kate Cory - taken 1905-1912 - Public Domain
Henry B. Cleaves - Public Domain
Unknown - Public Domain
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Paschen, F. (Friedrich), 1865-1947
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Sharon - CC BY-SA 4.0
Gibson, J. P.
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J. W. Glass - Public Domain
Rolfe, John, 1585-1622
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George Grantham Bain Collection (Library of Congress) - Public Domain
Barthou, Louis, 1862-1934
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Martin, James G. (James Grubbs), 1935-
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Burgoyne, John, 1722-1792
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Iger, Jerry
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sf2000 - Public Domain
Ibn Migash, Joseph ben Meir, ha-Levi, 1077-1141
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Ruckstull, F. W. (Fred Wellington), 1853-1942
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Nichols, John, 1745-1826
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Watson, John, 1725-1783
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Rachael Purdy - CC BY-SA 2.0
Blucas, Marc, 1972-....
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By Lewis Clinton Strang - Public Domain
Earle, Virginia, 1875-1937
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Siebbi - CC BY 3.0
Winterbottom, Michael
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unknown - Public Domain
Nugent, Maude
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Fleur-de-farine - CC BY-SA 4.0
Platel, Elisabeth
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Stitt, Kevin, 1972-
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Harris, Joel Chandler, 1848-1908
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NASA - Public Domain
Challenger (Spacecraft)
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University of Texas -
Jester, Beauford Halbert, 1893-1949
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Ryrie, Granville, Sir, 1865-1937
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Armando Spadini - Public Domain
Spadini, Armando, 1883-1925
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Drexel, Jeremias, 1581-1638
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Carpenter, Philo, 1805-1886
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Unknown photographer - Kate Cory - taken 1905-1912 - Public Domain
Cory, Kate, 1861-1958
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Henry B. Cleaves - Public Domain
Cleaves, Henry B. (Henry Bradstreet), 1840-1912
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Kirnberger, Johann Philipp, 1721-1783
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unknown - Public Domain
Needham, Alicia Adélaïde
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Unknown - Public Domain
Cohan, George M.
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Woodruff, Hale, 1900-1980