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References
- 1 2 3 "Tord Hall | Nationalencyklopedin". Ne.se. Retrieved 2014-01-06.
- 1 2 "The Mathematics Genealogy Project - Tord Hall". Genealogy.math.ndsu.nodak.edu. Retrieved 2014-01-06.
- ↑ Hayman, W. K. (March 1974). "On a theorem of Tord Hall". Duke Mathematical Journal. 41 (1): 25–26. doi:10.1215/S0012-7094-74-04103-9 . Retrieved 2014-01-06.
- ↑ Stephen G. Brush (1996-02-23). "A History of Modern Planetary Physics: Transmuted Past" . Retrieved 2014-01-06.
- ↑ Martin Gardiner. "Mathematical Puzzling" . Retrieved 2014-01-06.
- ↑ "Carl Friedrich Gauss, A Biography by Tord Hall. by (Hall, Tord.) from Richard Press Art Books | Sacramento, CA". Bibliopolis. Retrieved 2014-01-06.
- ↑ Tord Hall. "Tord Hall (Author of Carl Friedrich Gauss)". Goodreads.com. Retrieved 2014-01-06.
