Columbia subject headings:
Harvard subject headings:
Energy policy--Europe, Eastern
Energy policy--European Union countries
Europe, Eastern--Foreign relations--European Union countries.
European Neighbourhood Policy (Program)
European Union countries--Foreign relations--Europe, Eastern.
European Union--Europe, Eastern.
Security, International--Europe, Eastern.
Security, International--European Union countries
Princeton subject headings:
Europe, Eastern--Relations--European Union countries.
European Union countries--Relations--Europe, Eastern.
European Union--Europe, Eastern.