Columbia subject headings:
Cities and towns--Political aspects--Italy--Congresses.
Political science--Italy--History--19th century--Congresses.
Political science--Italy--History--20th century--Congresses.
Harvard subject headings:
Cities and towns--Political aspects--Italy--Congresses.
Political science--Italy--History--19th century--Congresses.
Political science--Italy--History--20th century--Congresses.
Princeton subject headings:
Cities and towns--Political aspects--Italy--Congresses.
Political science--Italy--History--19th century--Congresses.
Political science--Italy--History--20th century--Congresses.