Columbia subject headings:
Iraq--History--762-1258.
Islamic Empire--History--750-1258.
Mosul (Iraq)--History.
Syria--History--750-1260.
Harvard subject headings:
Iraq--History--762-1258.
Islamic Empire--History--750-1258.
Mosul (Iraq)--History.
Syria--History--750-1260.
Princeton subject headings:
Iraq--History--634-1534.
Islamic Empire--History--750-1258.
Mosul (Iraq)--History.
Syria--History--750-1260.