Columbia subject headings:
Harvard subject headings:
European Union countries--Economic integration--Congresses.
European Union countries--Foreign relations--Congresses.
European Union--Congresses.
European cooperation--Congresses.
Law--Europe--International cooperation--Congresses.
Princeton subject headings:
European Union countries--Economic integration--Congresses.
European Union countries--Foreign relations--Congresses.
European Union--Congresses.
European cooperation--Congresses.
Law--Europe--International cooperation--Congresses.