Columbia subject headings:
Harvard subject headings:
Architecture and society--Congresses
Cities and towns--Congresses
Cities and towns--History--Congresses
Cities and towns--Social aspects--Congresses.
City planning--History--Congresses.
Civilization--History--Congresses.
Urbanization--Congresses
World history--Congresses.
Princeton subject headings:
Architecture and society--Congresses.
Cities and towns--History--Congresses.
City planning--History--Congresses.
Civilization--History--Congresses.
Urbanization--Congresses.
World history--Congresses.