Columbia subject headings:
Communism--Italy--History--20th century.
Communism--Soviet Union--History.
Partito comunista italiano--History.
Harvard subject headings:
Communism--Italy--History--20th century
Communism--Soviet Union--History
Partito comunista italiano--History.
Princeton subject headings:
Communism--Italy.
Fascism--Italy.
Partito comunista italiano.