Columbia subject headings:
Harvard subject headings:
Carols
Catholic Church--Liturgy.
Gregorian chants
Sound recordings
Thomas, à Becket, Saint, 1118?-1170
Vespers (Music)
Princeton subject headings:
Carols--15th century.
Chants.
Gregorian chants.
Rhymed offices.
Thomas, à Becket, Saint, 1118?-1170--Songs and music.