Columbia subject headings:
Harvard subject headings:
Catholic Church--Foreign relations--Italy.
Catholic Church--Italy--History--20th century.
Catholic Church. Treaties, etc. 1929 February 11.
Church and state--Italy.
Italy--Church history--20th century.
Italy--Relations--Catholic Church.
Orlando, Vittorio Emanuele, 1860-1952.
Princeton subject headings:
Catholic Church--Italy--History--20th century.
Catholic Church--Relations--Italy.
Catholic Church.
Church and state--Italy.
Italy--Church history--20th century.
Italy--Foreign relations--Catholic Church.
Orlando, Vittorio Emanuele, 1860-1952.