Columbia subject headings:
Benedict, Saint, Abbot of Monte Cassino. Regula.
Benedictines--History.
Benedictines--Rules.
Catholic Church--Liturgy--History.
Divine office--History.
Monastic and religious life--History.
Monasticism and religious orders--History.
Severus, Emmanuel von, 1908-1997.
Harvard subject headings:
Catholic Church--Liturgy.
Monasticism and religious orders.
Severus, Emmanuel von, 1908-1997
Princeton subject headings:
Benedict, Saint, Abbot of Monte Cassino. Regula.
Benedictines--History.
Benedictines--Rules.
Catholic Church--Liturgy--History.
Divine office--History.
Monastic and religious life--History.
Monasticism and religious orders--History.
Severus, Emmanuel von, 1908-1997.