Columbia subject headings:
Harvard subject headings:
Abū Ḥayyān al-Tawḥīdī, ʻAlī ibn Muḥammad, active 10th century
Islamic Empire--History--750-1258.
Islamic Empire--Intellectual life.
Islamic civilization.
Princeton subject headings:
Abū Ḥayyān al-Tawḥīdī, ʻAlī ibn Muḥammad, active 10th century.
Islamic Empire--History--750-1258.
Islamic Empire--Intellectual life.
Islamic civilization.