Columbia subject headings:
Europe--Politics and government--1945---Congresses.
European federation--Congresses.
Local government--Europe--Congresses.
Harvard subject headings:
Europe--Politics and government--1945---Congresses.
European federation--Congresses
Local government--Europe--Congresses
Princeton subject headings:
Europe--Politics and government--1945---Congresses.
European federation--Congresses.
Local government--Europe--Congresses.