Columbia subject headings:
Communism--Italy--Emilia-Romagna--History--20th century.
Emilia-Romagna (Italy)--Politics and government.
Partito comunista italiano--History.
Harvard subject headings:
Communism--Italy--Emilia-Romagna--History--20th century.
Emilia-Romagna (Italy)--Politics and government.
Partito comunista italiano
Partito comunista italiano--History.
Political parties--Italy
Princeton subject headings:
Partito comunista italiano.
Political parties--Italy.