Full reference OpenMind biblio ref
Goldstein, Bernard, and Gad Freudenthal. 1992. “Levi Ben Gerson's Contributions To Astronomy”. In Studies On Gersonides: A Fourteenth-Century Jewish Philosopher-Scientist, 3-20. Leiden: E. J. Brill.
{ Bernard Goldstein, Gad Freudenthal, 1992 #519 }