Columbia subject headings:
Harvard subject headings:
Caliphs--Biography.
Islamic Empire--History--622-661.
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661
Princeton subject headings:
Caliphs--Biography.
Islamic Empire--History--622-661.
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661.