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