Columbia subject headings:
Harvard subject headings:
Rome--Civilization--History
Rome--Politics and government--30 B.C.-476 A.D.
Rome--Politics and government--510 B.C.-30 B.C.
Princeton subject headings:
Rome--Civilization--Sources.
Rome--History--Empire, 30 B.C.-476 A.D.
Rome--History--Republic, 265-30 B.C.