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