Columbia subject headings:
Africa--Commerce--History.
Carthage (Extinct city)--History.
Egypt--History--To 640 A.D.
Ethiopia--History--To 1490.
Harvard subject headings:
Princeton subject headings:
Africa--Commerce--History.
Carthage (Extinct city)--History.
Egypt--History--To 640 A.D.
Ethiopia--History--To 1400.