Columbia subject headings:
Omar Khayyam--Literary style.
Omar Khayyam--Translations into Arabic--History and criticism.
Omar Khayyam. Rubāʻīyāt.
Harvard subject headings:
Omar Khayyam--Literary style.
Omar Khayyam--Translations into Arabic--History and criticism.
Omar Khayyam. Rubāʻīyāt
Princeton subject headings:
Omar Khayyam--Literary style.
Omar Khayyam--Translations into Arabic--History and criticism.
Omar Khayyam. Rubāʻīyāt.