Columbia subject headings:
Islamic Empire--History--Early works to 1800.
Islamic Empire--Kings and rulers--Early works to 1800.
Harvard subject headings:
Islamic Empire--History--Early works to 1800.
Islamic Empire--Kings and rulers--Early works to 1800.
Princeton subject headings:
Islamic Empire--History--Early works to 1800.
Islamic Empire--Kings and rulers--Early works to 1800.