Columbia subject headings:
European Union countries--Foreign relations--Congresses.
European federation--Congresses.
Security, International--European Union countries--Congresses.
Treaty on European Union Protocols, etc.--Congresses.
Harvard subject headings:
European Union countries--Foreign relations--Congresses.
European federation--Congresses
Security, International--European Union countries--Congresses.
Treaty on European Union Protocols, etc.--Congresses.
Princeton subject headings: