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