Columbia subject headings:
Catholic Church--Italy--History--20th century.
Church and state--Italy--History--20th century.
Concordato fra la S. Sede e l'Italia
Concordats.
Italy--Church history--20th century.
Harvard subject headings:
Catholic Church--Italy--History--20th century.
Catholic Church. Treaties, etc. 1929 February 11.
Church and state--Italy--History--20th century
Concordats.
Italy--Church history--20th century.
Princeton subject headings:
Catholic Church--Italy--History--20th century.
Catholic Church. Treaties, etc. 1929 February 11.
Church and state--Italy--History--20th century.
Concordats.
Italy--Church history--20th century.