Columbia subject headings:
Italy--Politics and government--1945-1976.
Partito socialista italiano.
Socialism--Italy.
Harvard subject headings:
Italy--Politics and government--1945-
Partito socialista italiano.
Socialism--Italy
Princeton subject headings:
Italy--Politics and government--1945-1976.
Italy--Politics and government--1976-1994.
Partito socialista italiano.
Socialism--Italy.