Encyclicals and other letters of Pius XII Vol.6 Mystical Body of Christ - Mystici Corporis 1943|Promotion of biblical studies - Divino Afflante Spiritu 1943|Christian worship - Mediator Dei 1947|Holy virginity - Sacra Virginitas 1954|Priestly perfection - Sacerdotii nostri Primordia 1959 (John XXIII) - Pius XII|John XXIII (London Catholic Truth Society, various dates .)