Encyclical letter of His Holiness Pius XI, by Divine providence, pope to our venerable brethren: the patriarchs, primates, archbishops, bishops and other ordinaries, in peace and communion with the Apostolic See, and to all the faithful of the Catholic world, on reconstructing the social order and perfecting it conformably to the precepts of the Gospel, in commemoration of the fortieth anniversary of the encyclical "Rerum novarum."

Eitemau Tebyg

• Encyclical letter (Quadragesimo anno) of His Holiness Pope Pius XI, on reconstructing the social order and perfecting it conformably to the precepts of the gospel, in commemoration of the fortieth anniversary of the enclyclical "Rerum novarum."
  gan: Pius XI, Pope, 1857-1939; Catholic Church. Pope (1922-1939 : Pius XI)
  Wedi'i Greu: (1954)
• Quadragesimo anno : encyclical letter on reconstructing the social order /
  Wedi'i Greu: (1942)
• The Church and the Worker, Before and after the Encyclical Rerum Novarum
  gan: Crawford, Virginia M. (Virginia Mary), 1862-1948
  Wedi'i Greu: (1917)
• Encyclical letter of His Holiness, Pius XI, by Divine Providence Pope to our venerable brethren, the patriarchs, primates, archbishops, bishops and other ordinaries, in peace and communion with the Apostolic See concerning Catholic Action.
  Wedi'i Greu: (1931)
• Encyclical letter of Pope Pius XI on reconstructing the social order.
  Wedi'i Greu: (1939)