Columbia subject headings:
Communism--Italy--History--Sources--Bibliography--Catalogs.
Fondazione Istituto Gramsci--Archives--Catalogs.
Partito comunista d'Italia--History--Sources--Bibliography--Catalogs.
Harvard subject headings:
Communism--Italy--History--Sources--Bibliography--Catalogs.
Fondazione Istituto Gramsci--Archives--Catalogs.
Partito comunista d'Italia--History--Sources--Bibliography--Catalogs.
Princeton subject headings:
Communism--Italy--Archival resources.
Fondazione Istituto Gramsci.
Labor movement--Italy--Archival resources.
Partito comunista italiano--Archives.