Columbia subject headings:
Africa, North--History--647-1517.
Sicily (Italy)--History--1282-1409.
Harvard subject headings:
Africa, North--History--647-1517.
Sicily (Italy)--History--1282-1409
Princeton subject headings:
Africa, North--History--647-1517--Early works to 1800.
Arabs--Africa, North--Kings and rulers--Early works to 1800.
Arabs--Italy--Sicily--Kings and rulers--Early works to 1800.
Sicily (Italy)--History--1282-1409--Early works to 1800.