Columbia subject headings:
Egypt--Commerce--History--To 500.
Egypt--Commerce--History.
Egypt--Commerce--Political aspects--History.
Egypt--Politics and government--30 B.C.-640 A.D.
Egypt--Politics and government--332-30 B.C.
Harvard subject headings:
Egypt--Commerce--History.
Princeton subject headings:
Egypt--Commerce--History--To 500.
Egypt--Commerce--Political aspects--History.
Egypt--Politics and government--30 B.C.-640 A.D.
Egypt--Politics and government--332 B.C.-30 B.C.