Columbia subject headings:
Civilization, Medieval.
Economic history--Medieval, 500-1500.
Italy--Economic conditions.
Harvard subject headings:
Europe--Economic conditions--To 1492.
Europe--History--476-1492.
Europe--Social conditions--To 1492.
Princeton subject headings:
Europe--Economic conditions--To 1492.
Europe--History--476-1492.
Europe--Social conditions--To 1492.