Columbia subject headings:
Catholic Church--Liturgy--History--20th century.
Catholic Church. Ordo paenitentiae.
Paul VI, Pope, 1897-1978.
Penance--History--20th century.
Penance--History.
Reconciliation--Religious aspects--Catholic Church.
Vatican Council (2nd : 1962-1965 : Basilica di San Pietro in Vaticano). Constitutio de sacra liturgia.
Harvard subject headings:
Catholic Church--Liturgy--History--20th century.
Catholic Church. Ordo paenitentiae.
Paul VI, Pope, 1897-1978
Penance--History
Penance--History--20th century.
Reconciliation--Religious aspects--Catholic Church
Vatican Council (2nd : 1962-1965 : Basilica di San Pietro in Vaticano) Constitutio de sacra liturgia.
Princeton subject headings:
Catholic Church--Liturgy--History--20th century.
Catholic Church. Ordo paenitentiae
Paul VI, Pope, 1897-1978.
Penance--History--20th century.
Penance--History.
Reconciliation--Religious aspects--Catholic Church.
Vatican Council (2nd : 1962-1965 : Basilica di San Pietro in Vaticano). Constitutio de sacra liturgia