Columbia subject headings:
Harvard subject headings:
Italy--Politics and government--20th century.
Lombardi, Riccardo, 1901-1984.
Socialism--Italy--20th century.
Socialism--Italy--History--20th century
Princeton subject headings:
Italy--Politics and government--1945-1976.
Lombardi, Riccardo, 1901-1984.
Socialism--Italy--History--20th century.