Columbia subject headings:
Catholic Church--Liturgy--Early works to 1800.
Eastern churches--Liturgy--Early works to 1800.
Eastern churches--Liturgy--History.
Liturgies--Early works to 1800.
Liturgies--History.
Mass--Early works to 1800.
Mass--History.
Harvard subject headings:
Catholic Church--Liturgy.
Lord's Supper--Catholic Church--History.
Princeton subject headings: