Catholic Church. Pope (1939-1958 : Pius XII), National Catholic Welfare Conference, & Pius XII, P. (1950). Humani generis: Encyclical letter of Pope Pius XII concerning some false opinions which threaten to undermine the foundations of Catholic doctrine. National Catholic Welfare Conference.

Catholic Church. Pope (1939-1958 : Pius XII), National Catholic Welfare Conference, and Pope Pius XII. Humani Generis: Encyclical Letter of Pope Pius XII Concerning Some False Opinions Which Threaten to Undermine the Foundations of Catholic Doctrine. Washington, D.C.: National Catholic Welfare Conference, 1950.

Catholic Church. Pope (1939-1958 : Pius XII), et al. Humani Generis: Encyclical Letter of Pope Pius XII Concerning Some False Opinions Which Threaten to Undermine the Foundations of Catholic Doctrine. National Catholic Welfare Conference, 1950.