On the missions
Subtitle: encyclical letter
By: Also an address to missionaries (October 16, 1959) and a Prayer for Mission Catholics
Contributors: John XXIII, Pope, 1881-1963
Publisher: National Catholic Welfare Conference
Published: 1960
Place of publication: Washington
Language: eng
Number of pages: 30
Work titles: Princeps pastorum (28 Nov. 1959)