Columbia subject headings:
Harvard subject headings:
Energy policy--European Union countries
European Union countries--Economic integration.
Infrastructure (Economics)--European Union countries.
Power resources--European Union countries.
Telecommunication policy--European Union countries.
Telecommunication--European Union countries.
Transportation and state--European Union countries.
Transportation--European Union countries.
Princeton subject headings:
Energy policy--European Union countries.
European Union countries--Economic integration.
Infrastructure (Economics)--European Union countries.
Power resources--European Union countries.
Telecommunication policy--European Union countries.
Telecommunication--European Union countries.
Transportation and state--European Union countries.
Transportation--European Union countries.