Columbia subject headings:
Europe--Politics and government--Congresses.
European federation--Congresses.
Local government--Europe--Congresses.
Regional planning--Law and legislation--Europe--Congresses.
Harvard subject headings:
Local government--Law and legislation--Europe.
Regional planning--Law and legislation--Europe.
Princeton subject headings:
Local government--Europe--Congresses.
Regional planning--Law and legislation--Europe--Congresses.