Columbia subject headings:
Anarchism--Italy--History--20th century.
Anarchists--Italy--History--20th century.
Communist parties--Italy--History--20th century.
Communists--Italy--History--20th century.
Italy--Politics and government--1945-1976.
Radicalism--Italy--History--20th century.
Radicals--Italy--History--20th century.
Harvard subject headings:
Anarchism--Italy--History--20th century
Anarchists--Italy--History--20th century.
Communist parties--Italy--History--20th century.
Communists--Italy--History--20th century.
Italy--Politics and government--1945-
Radicalism--Italy--History--20th century
Radicals--Italy--History--20th century.
Princeton subject headings:
Anarchism--Italy--History--20th century.
Anarchists--Italy--History--20th century.
Communist parties--Italy--History--20th century.
Communists--Italy--History--20th century.
Italy--Politics and government--1976-1994.
Radicalism--Italy--History--20th century.
Radicals--Italy--History--20th century.