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