Columbia subject headings:
Liturgics--History.
Wegman, Herman A. J., 1930-
Harvard subject headings:
Catholic Church--Liturgy--History.
Liturgics--History.
Lord's Supper.
Wegman, Herman A. J., 1930---Bibliography.
Worship.
Princeton subject headings:
Liturgics--Europe.
Wegman, Herman A. J., 1930-