Encyclical letter of His Holiness Pius XI, by divine providence, pope ... 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." - Catholic Church. Pope (1922-1939 : Pius XI); National Catholic Welfare Conference (London CAtholic Truth Society, 1960)
Keywords: Working class; Rerum novarum (Catholic Church. Pope (1878-1903 : Leo XIII)); Labor--Religious aspects--Christianity