Columbia subject headings:
Harvard subject headings:
Abbasids.
Islamic Empire--History--622-661.
Islamic Empire--History--661-750.
Islamic Empire--History--750-1258.
Khuḍarī, Muḥammad. Muḥāḍarāt tārīkh al-umam al-Islāmīyah.
Princeton subject headings:
Islamic Empire--History--622-661.
Islamic Empire--History--661-750.