Moshe Gil, In the Kingdom of Ishmael (in Hebrew) (Tel Aviv: Tel Aviv University, 1997), vol. 4.
for edition see
#816
Bibliographic citation
S. M. Stern, Nachlass at the National Library of Israel (Richard Walter Archive, Arc. 4•1656) (in German) (in French) (in Latin) (in Hungarian) (in Hebrew) (in Arabic) (in Judaeo-Arabic).