Columbia subject headings:
Land use--Environmental aspects--Portugal--Congresses.
Land use--Environmental aspects--Spain--Congresses.
Regional planning--Environmental aspects--Portugal--Congresses.
Regional planning--Environmental aspects--Spain--Congresses.
Sustainable development--Portugal--Congresses.
Sustainable development--Spain--Congresses.
Urban policy--Portugal--Congresses.
Urban policy--Spain--Congresses.
Harvard subject headings:
Princeton subject headings:
Land use, Urban--Portugal.
Land use, Urban--Spain.
Regional planning--Portugal.
Regional planning--Spain.
Urban policy--Portugal.
Urban policy--Spain.