Columbia subject headings:
City planning--Environmental aspects--OECD countries.
Environmental policy--OECD countries.
Sustainable development--OECD countries.
Urban ecology (Sociology)--OECD countries.
Urban policy--OECD countries.
Harvard subject headings:
City planning--Environmental aspects--OECD countries.
Environmental policy--OECD countries
Sustainable development--OECD countries.
Sustainable urban development--OECD countries.
Urban ecology (Sociology)--OECD countries.
Urban policy--OECD countries.
Princeton subject headings:
City planning--Environmental aspects--OECD countries.
Environmental policy--OECD countries.
Sustainable development--OECD countries.
Urban ecology (Sociology)--OECD countries.
Urban policy--OECD countries.