Columbia subject headings:
Abbasids--Early works to 1800.
Fatimites--Early works to 1800.
Hamdanids--Early works to 1800.
Islamic Empire--History--750-1258.
Islamic Empire--Kings and rulers--Early works to 1800.
Harvard subject headings:
Islamic Empire--History--750-1258--Early works to 1800.
Princeton subject headings: