Encyclical letter of Our Most Holy Lord Pius IX : by divine providence Pope, to all patriarchs, primates, archbishops, and other ordinaries in the grace and communion of the Apostolic See

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• Encyclical letter of our most holy lord, Leo XIII., by divine providence Pope : to all the patriarchs, primates, archbishops and bishops of the Catholic world holding grace and communion with the apostolic see. Concerning Jesus Christ our redeemer. Leo XIII and Apostolic Benediciton.
  gan: Leo XIII, Pope, 1810-1903
  Wedi'i Greu: (1900)
• Encyclical letter (Ad Petri cathedram) of His Holiness John XXIII by Divine Providence Pope to His Venerable Brethren the Patriarchs, Primates, Archbishops, Bishops, and all other local Ordinates that are at peace and in communion with the Apostolic See, and to the clergy and faithful of the Catholic world, concerning the attainment of truth, unity, and peace in the spirit of love.
  Wedi'i Greu: (1959)
• The Encyclical Letter of His Holiness, Pius IX, together with the Syllabus of Errors Condemned, to which is added the brief, "Arcano Divinae Providentiae" of 1846.
  gan: Pius IX, Pope, 1792-1878
  Wedi'i Greu: (1865)
• Love undying : a simplified edition of the encyclical Casti Connubii, on Christian marriage, by Pope Pius XI
  gan: Pius, Pope; Catholic Church. Pope (1922-1939 : Pius XI); Gerald C Treacy
  Wedi'i Greu: (1944)
• A guide to the encyclicals of the Roman pontiffs from Pius XII to Paul VI (1939-1978) /
  gan: Schmidt, Thomas V.
  Wedi'i Greu: (1981)