Columbia subject headings:
Rome--Economic conditions--30 B.C.-476 A.D.
Rome--History--Empire, 30 B.C.-284 A.D.
Harvard subject headings:
Rome--Economic conditions--30 B.C.-476 A.D.
Rome--History--Empire, 30 B.C.-284 A.D.
Princeton subject headings:
Rome--Economic conditions--30 B.C.-476 A.D.
Rome--History--Empire, 30 B.C.-284 A.D.