Columbia subject headings:
European Union countries--Foreign relations--Treaties--Congresses.
International and municipal law--European Union countries--Congresses.
Treaties--Accession--Congresses.
Treaty-making power--European Union countries--Congresses.
Harvard subject headings:
European Union countries--Foreign relations--Treaties--Congresses.
International and municipal law--European Union countries--Congresses.
Treaties--Accession--Congresses.
Treaty-making power--European Union countries--Congresses.
Princeton subject headings:
European Union countries--Foreign relations--Treaties--Congresses.
International and municipal law--European Union countries--Congresses.
Treaties--Accession--Congresses.
Treaties.
Treaty-making power--European Union countries--Congresses.