Columbia subject headings:
Cities and towns, Medieval--Austria--Congresses.
Cities and towns--Austria--Congresses.
Harvard subject headings:
Cities and towns, Medieval--Austria--Congresses.
Cities and towns--Austria--Congresses.
Cities and towns--Europe--History--Congresses
City and town life--Europe--History--Congresses.
Communication and traffic--Europe--History--Congresses.
Public welfare--Europe--History--Congresses.
Sociology, Urban--Europe--History--Congresses.
Princeton subject headings:
Cities and towns--Europe--History--Congresses.
City and town life--Europe--History--Congresses.
Communication and traffic--Europe--History--Congresses.
Public welfare--Europe--History--Congresses.
Sociology, Urban--Europe--History--Congresses.