Columbia subject headings:
Harvard subject headings:
Europe, Eastern--Foreign economic relations--European Union countries.
Europe--Economic integration.
European Union countries--Foreign economic relations--Europe, Eastern.
European Union--Europe, Eastern.
Princeton subject headings:
Europe, Central--Foreign economic relations--European Union countries.
Europe, Eastern--Foreign economic relations--European Union countries.
Europe--Economic integration.
European Union countries--Foreign economic relations--Europe, Central.
European Union countries--Foreign economic relations--Europe, Eastern.
European Union--Europe, Central.
European Union--Europe, Eastern.