Columbia subject headings:
Energy policy--European Union countries.
Energy policy--Turkey.
European Union countries--Foreign economic relations--Turkey.
European Union countries--Foreign relations--Turkey.
European Union--Turkey--Membership.
Turkey--Foreign economic relations--European Union countries.
Turkey--Foreign relations--European Union countries.
Harvard subject headings:
Energy policy--European Union countries
Energy policy--Turkey.
European Union countries--Foreign economic relations--Turkey.
European Union countries--Foreign relations--Turkey.
European Union--Turkey--Membership.
Turkey--Foreign economic relations--European Union countries.
Turkey--Foreign relations--European Union countries.
Princeton subject headings: