Columbia subject headings:
Harvard subject headings:
City planning--Europe
City planning--European Union countries.
Environmental auditing--Europe.
Environmental auditing--European Union countries.
Urban ecology (Sociology)--European Union countries.
Urban transportation--Europe.
Urban transportation--European Union countries.
Urbanization--Europe
Princeton subject headings:
City planning--Europe.
Environmental auditing--Europe.
Urban ecology (Sociology)--Europe.
Urban transportation--Europe.
Urbanization--Europe.