Columbia subject headings:
Europe--Economic conditions--To 1492.
Europe--Social conditions--To 1492.
Labor--Europe--History--To 1500.
Wages--Europe--History--To 1500.
Harvard subject headings:
Europe--Economic conditions--To 1492.
Europe--Social conditions--To 1492.
Labor--Europe--History--To 1500.
Wages--Europe--History--To 1500.
Princeton subject headings:
Europe--Economic conditions--To 1492.
Europe--Social conditions--To 1492.
Labor--Europe--History--To 1500.
Wages--Europe--History--To 1500.