Columbia subject headings:
Abū Ḥayyān al-Tawḥīdī, ʻAlī ibn Muḥammad, active 10th century.
Sufism.
Harvard subject headings:
Abū Ḥayyān al-Tawḥīdī, ʻAlī ibn Muḥammad, active 10th century
Sufism
Princeton subject headings:
Abū Ḥayyān al-Tawḥīdī, ʻAlī ibn Muḥammad, active 10th century.
Sufism.