Columbia subject headings:
Harvard subject headings:
Communism--History--20th century
Communism--Italy--History--20th century
Italy--Foreign relations--20th century.
Italy--Politics and government--20th century.
World politics--20th century
Princeton subject headings:
Communism--History--20th century.
Communism--Italy--History--20th century.
Italy--Foreign relations--20th century.
Italy--Politics and government--20th century.
World politics--20th century.