In search of Omar Khayyam /
Dashti, ʻAli1896-approximately 1981.
Elwell-Sutton, L. P.(Laurence Paul),1912-1984.
London Allen and Unwin
1971
Originally published as 'Dami ba Khayyam'. Tehran: Amir Kabir, 1966
bibl p267-270
Omar Khayyam.