Columbia subject headings:
Europe, Eastern--Commerce--European Union countries.
Europe--Economic integration.
European Union countries--Commerce--Europe, Eastern.
European Union--Europe, Eastern.
Harvard subject headings:
Europe, Eastern--Commerce--European Union countries.
Europe--Economic integration.
European Union countries--Commerce--Europe, Eastern.
European Union--Europe, Eastern.
Princeton subject headings:
Europe, Eastern--Commerce--European Union countries.
Europe--Economic integration.
European Union countries--Commerce--Europe, Eastern.
European Union--Europe, Eastern.