Columbia subject headings:
Catholic Church--Europe--History--20th century--Sources.
Christian democratic parties--Italy--History--20th century.
Europe--Politics and government--1945-
European federation--History.
Harvard subject headings:
Catholics--Political activity--Italy
Christian democratic parties--Italy--History--20th century.
Europe--Politics and government--20th century.
Princeton subject headings:
Catholic Church--Europe--History--20th century--Sources.
Christian democratic parties--Italy--History--20th century.
Europe--Politics and government--1945-
European federation--History.