Columbia subject headings:
Art, Municipal--Congresses.
City planning--Congresses.
Public spaces--Congresses.
Urban beautification--Congresses.
Harvard subject headings:
Public spaces--Political aspects.
Public spaces--Social aspects.
Sociology, Urban.
Princeton subject headings:
City planning--Congresses.
Public spaces--Congresses.
Sociology, Urban--Congresses.
Urban beautification--Congresses.