Columbia subject headings:
Europe--Economic conditions--To 1492.
Europe--Historical geography.
Europe--Social conditions--To 1492.
Harvard subject headings:
Cities and towns--Europe.
Europe--Historical geography.
Europe--Social conditions.
Human geography--Europe
Human geography--Europe--History.
Social evolution.
Princeton subject headings:
Europe--Economic conditions--To 1492.
Europe--Historical geography.
Europe--Social conditions--To 1492.