Columbia subject headings:
Islamic Empire--History--622-661.
Opposition (Political science)
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661.
Harvard subject headings:
Islamic Empire--History--622-661.
Opposition (Political science)
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661
Princeton subject headings:
Islamic Empire--History--622-661.
Opposition (Political science)
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661.