Columbia subject headings:
Harvard subject headings:
Rome--Foreign relations--284-476.
Rome--Foreign relations--30 B.C.-284 A.D.
Rome--Politics and government--284-476
Rome--Politics and government--30 B.C.-284 A.D.
Princeton subject headings:
Rome--Foreign relations--284-476.
Rome--Foreign relations--30 B.C.-284 A.D.
Rome--Politics and government--284-476.
Rome--Politics and government--30 B.C.-284 A.D.