Columbia subject headings:
Cities and towns--Europe--Growth--History.
Urban economics--History.
Urbanization--Europe--History.
Harvard subject headings:
Cities and towns, Medieval
Cities and towns--Europe--Growth--History.
Europe--Economic conditions
Urban economics--History.
Urbanization--Europe--History
Princeton subject headings:
Cities and towns--Europe--Growth--History.
Urban economics--History.
Urbanization--Europe--History.