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Commentarium Catholicum – Et unam, sanctam, catholicam et apostolicam Ecclesiam.
Et unam, sanctam, catholicam et apostolicam Ecclesiam.
unam sanctamcommentariumet
https://press.vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_decree_19651118_apostolicam-actuositatem_en.html
Apostolicam actuositatem
Decree on the Apostolate of Laity - Apostolicam Actuositatem