Columbia subject headings:
Harvard subject headings:
Caliphs.
Imams (Shiites)
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661
Princeton subject headings:
Caliphs.
Imams (Shiites)
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661.