Columbia subject headings:
Cities and towns--England--History.
Cities and towns--Europe--History.
Cities and towns--Russia--History.
Feudalism--England--History.
Feudalism--Europe--History.
Feudalism--Russia--History.
Harvard subject headings:
Cities and towns--England--History
Cities and towns--Europe--History
Cities and towns--Russia--History.
Feudalism--England--History.
Feudalism--Europe--History
Feudalism--Russia--History.
Princeton subject headings:
Cities and towns, Medieval--Europe.