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