Columbia subject headings:
Harvard subject headings:
Alids.
Caliphate
Imamate.
Islam and state.
Islamic Empire--History--622-661.
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661--Imamate.
Princeton subject headings:
Caliphate.
Imamate.
Islam and state.
Islamic Empire--History--622-661.
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661.