Catholic Church. Pope (1939-1958 : Pius XII) & Pius XII, P. (1951). Evangelii praecones: Encyclical letter of His Holiness Pope Pius XII :to our venerable brethren, patriarchs, primates, archbishops, bishops and other local ordinaries enjoying peace and communion with the apostolic see, on promoting Catholic missions. National Catholic Welfare Conference.

Catholic Church. Pope (1939-1958 : Pius XII) and Pope Pius XII. Evangelii Praecones: Encyclical Letter of His Holiness Pope Pius XII :to Our Venerable Brethren, Patriarchs, Primates, Archbishops, Bishops and Other Local Ordinaries Enjoying Peace and Communion with the Apostolic See, on Promoting Catholic Missions. Washington: National Catholic Welfare Conference, 1951.

Catholic Church. Pope (1939-1958 : Pius XII) and Pope Pius XII. Evangelii Praecones: Encyclical Letter of His Holiness Pope Pius XII :to Our Venerable Brethren, Patriarchs, Primates, Archbishops, Bishops and Other Local Ordinaries Enjoying Peace and Communion with the Apostolic See, on Promoting Catholic Missions. National Catholic Welfare Conference, 1951.