Columbia subject headings:
Harvard subject headings:
Europe--Geography--Congresses.
Europe--Historiography--Congresses.
Europe--History--1945---Congresses.
European Union countries--Politics and government--Congresses.
European Union--Congresses.
European Union--History--Congresses.
European federation--History--Congresses.
Law--Europe--History--Congresses
Law--European Union countries--Congresses
Princeton subject headings:
Europe--History--1945---Congresses.
European Union countries--Politics and government--Congresses.
European Union--History--Congresses.
Law--European Union countries--Congresses.