Columbia subject headings:
Harvard subject headings:
Cities and towns--History--Congresses
City and town life--History--Congresses.
Social control--History--Congresses.
Urban health--History--Congresses.
Urbanization--History--Congresses.
Princeton subject headings:
City planning--Social aspects--Congresses.
Social control--History--Congresses.
Social planning--History--Congresses.
Urbanization--Social aspects--Congresses.