Columbia subject headings:
Decentralization in government--Europe--Congresses.
Municipal government--Europe--History--19th century--Congresses.
Municipal government--Europe--History--20th century--Congresses.
Harvard subject headings:
Decentralization in government--Europe--Congresses.
Municipal government--Europe--History--19th century--Congresses.
Municipal government--Europe--History--20th century--Congresses.
Princeton subject headings:
Municipal government--Europe--History--19th century--Congresses.
Municipal government--Europe--History--20th century--Congresses.