Columbia subject headings:
Cities and towns, Medieval.
Social history--Medieval, 500-1500.
Harvard subject headings:
Cities and towns, Medieval
Cities and towns--Europe--History--476-1492.
Civilization, Medieval
Europe--History--476-1492.
Heers, Jacques
Urbanization--Europe--History--476-1492.
Princeton subject headings:
Cities and towns, Medieval.
Heers, Jacques.
Social history--Medieval, 500-1500.