Columbia subject headings:
Political parties--Italy--History--Archival resources.
Harvard subject headings:
Political parties--Italy--Archival resources--Congresses.
Political parties--Italy--History--20th century--Congresses.
Political parties--Italy--History--Archival resources.
Princeton subject headings:
Political parties--Italy--Archival resources--Congresses.
Political parties--Italy--History--20th century--Congresses.