Columbia subject headings:
Harvard subject headings:
City planning--Congresses
Cultural property--Protection--Congresses
Historic sites--Conservation and restoration--Congresses.
Landscape protection--Congresses.
Sustainable urban development--Congresses.
Urban ecology (Sociology)--Congresses
World Heritage areas--Congresses.
Princeton subject headings:
City planning--Congresses.
Cultural property--Protection--Congresses.
Historic sites--Conservation and restoration--Congresses.
Landscape protection--Congresses.
Sustainable urban development--Congresses.
Urban ecology (Sociology)--Congresses.
World Heritage areas--Congresses.