Columbia subject headings:
Catholic Church--Italy--History--20th century.
Dissenters, Religious--Italy--History--20th century.
Italy--Church history--20th century.
Harvard subject headings:
Catholic Church--Italy--History--20th century.
Dissenters, Religious--Italy--History--20th century.
Italy--Church history--20th century.
Princeton subject headings:
Catholic Church--Italy--History--20th century.
Dissenters, Religious--Italy--History--20th century.
Italy--Church history--20th century.