Columbia subject headings:
Africa, North--History--Bibliography.
Africa, North--Relations--Portugal--Bibliography.
Portugal--History--Bibliography.
Portugal--Relations--Africa, North--Bibliography.
Harvard subject headings:
Africa, North--Relations--Spain--Bibliography.
Spain--Relations--Africa, North--Bibliography.
Princeton subject headings:
Africa, North--History, Military--Bibliography.
Africa, North--History--Bibliography.
Muslims--Africa, North--History--Bibliography.
Portugal--History, Military--Bibliography.
Portugal--History--Bibliography.
Portugal--Relations--Africa, North--Bibliography.
Spain--History, Military--Bibliography.
Spain--History--Bibliography.
Spain--Relations--Africa, North--Bibliography.