Columbia subject headings:
Catholic Church--Foreign relations.
Concordat of 1929.
International law.
Popes--Temporal power.
Harvard subject headings:
Catholic Church--Foreign relations.
Catholic Church. Trattato e concordato fra la Santa sede e l'Italia. Treaties, etc. 1922- Pius XI.
Catholic Church. Treaties, etc. 1929 February 11.
International law.
Popes--Temporal power
Princeton subject headings:
Catholic Church Trattato e concordato fra la Santa sede e l'Italia. Treaties, etc., 1922- (Pius XI)
Catholic Church--Foreign relations.
Catholic Church. Treaties, etc. 1929 February 11.
International law and relations.
Popes--Temporal power.