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Florida Supercon - CC BY 2.0
Eugène Pirou - Public Domain
Sandra V. Doubleday - Public Domain
Robert L. Knudsen - Public Domain
original uploader - Public Domain
unknown photographer (no name in catalogue of Literatuurmuseum either) - Public Domain
Public Domain
Martin Labelle - CC BY-SA 2.0
unknown - Public Domain
1830 - CC BY-SA 4.0
Internet Archive Book Images -
LSE Library - Public Domain
user at project - Public Domain
Peter Britt, 1819-1905 or Peter Emil Britt, 1862-1950 - CC BY-SA 3.0
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Florida Supercon - CC BY 2.0
Hutchison, Anna, 1986-
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Eugène Pirou - Public Domain
Broch, O. J. (Ole Jakob), 1818-1889
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Sandra V. Doubleday - Public Domain
Chamberlain, Richard, 1935-....
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Robert L. Knudsen - Public Domain
Harrison, Albertis S. (Albertis Sydney), 1907-1995
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Diagne, Blaise, 1872-1934
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original uploader - Public Domain
Clarke, Herbert L. (Herbert Lincoln), 1867-1945
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unknown photographer (no name in catalogue of Literatuurmuseum either) - Public Domain
Nijhoff, Martinus, 1894-1953
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Tooke, Thomas, 1774-1858
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Bashford, J. W. (James Whitford), 1849-1919
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Wentworth, John, 1737-1820
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Halhed, Nathaniel Brassey, 1751-1830
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Public Domain
Jesup, Thomas Sidney, 1788-1860
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Pauling, Linus, 1901-1994
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Cooke, Nicholas, 1717-1782
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Ratzel, Friedrich, 1844-1904?
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Public Domain
Makarova, T. (Tamara), 1907-1997
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Spooner, Lysander, 1808-1887
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Devon, William Courtenay, Earl of, 1768-1835
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Mayfield, Earle Bradford, 1881-1964
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Martin Labelle - CC BY-SA 2.0
Charles, Grégory 1968-....
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Palucca, Gret, 1902-1993
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Bonney, Thérèse (1894-1978).
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unknown - Public Domain
Nagel, Christian Heinrich von 1803-1882
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1830 - CC BY-SA 4.0
Harris, Thaddeus Mason, 1768-1842
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Internet Archive Book Images -
Emerson, William K.
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Richards, Robert H. (Robert Hallowell), 1844-1945
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LSE Library - Public Domain
Meade, J.E. (James Edward), 1907-1995
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user at project - Public Domain
Shemuʼelevits, Ḥayim, 1901-1979
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Thesiger, Ernest Frederic Graham, 1879-1961
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Peter Britt, 1819-1905 or Peter Emil Britt, 1862-1950 - CC BY-SA 3.0
Britt, Peter, 1819-1905