Columbia subject headings:
Harvard subject headings:
Europe--Economic conditions--To 1492
Europe--History--476-1492
Rome--Economic conditions--30 B.C.-476 A.D.
Rome--History--Empire, 30 B.C.-476 A.D.
Princeton subject headings:
Europe--Economic conditions--To 1492.
Europe--History--476-1492.
Rome--History--Empire, 30 B.C.-476 A.D.