Note 408 — Chapter IV · THE SOURCES FOR THE PERIOD 1100–1250 A. D.
Reading edition
On the date of Plato of Tivoli, see C. H. Haskins, The Translations of Hugo Sanctelliensis, in: Romanic Review, vol. ii, New York, 1911, p. 2, note 5. On Al-Battānī, see above, p. 78.