Columbia subject headings:
Benedictines--Rules.
Monasticism and religious orders--Liturgy.
Monasticism and religious orders--Rules.
Harvard subject headings:
Catholic Church--Liturgy--History.
Sacro Speco (Abbey : Subiaco, Italy)
Subiaco (Italy)--Religious life and customs.
Princeton subject headings:
Catholic Church--Liturgy--History.
Sacro Speco (Abbey : Subiaco, Italy)
Subiaco (Italy)--Religious life and customs.