Columbia subject headings:
Italy--Politics and government--1945-1976.
Italy--Politics and government--1976-1994.
Italy--Politics and government--1994-2018.
Referendum--Italy.
Harvard subject headings:
Italy--Politics and government--1945-1976.
Italy--Politics and government--1976-1994.
Italy--Politics and government--1994-2018
Referendum--Italy.
Princeton subject headings:
Italy--Politics and government--1945-1976.
Italy--Politics and government--1976-1994.
Italy--Politics and government--1994-.
Referendum--Italy.