The popes and the missions. Four Encyclical letters. (Maximun Illud, apostolic letter of Benedict XV, November 30th, 1919; Rerum Ecclesiae, encyclical letter of Pius XI, February 28th, 1926; Evangelii Praecones, encyclical letter of Pius XII, June 2nd, 1951; Fidei Donum, encyclical letter of Pius XII, April 21st, 1957.
Sword of the Spirit (London)
London, 
[1957]