Columbia subject headings:
Abū Yazīd Bisṭāmī, Ṭayfūr ibn ʻĪsá, -874?
Sufism--Iran--History.
Harvard subject headings:
Abū Yazīd Bisṭāmī, Ṭayfūr ibn ʻĪsá, -874?
Sufism--Iran--History.
Princeton subject headings: