Columbia subject headings:
Cities and towns--Growth--Congresses.
Civilization--History--Congresses.
Community development, Urban--Congresses.
Social change--Congresses.
Harvard subject headings:
Cities and towns--Growth--Congresses
Civilization--History--Congresses.
Community development, Urban--Congresses.
Social change--Congresses
Princeton subject headings:
Cities and towns--Growth--Congresses.
Civilization--History--Congresses.
Community development, Urban--Congresses.
Social change--Congresses.