Columbia subject headings:
Antiphons (Music)
Carols, English.
Christmas music.
Gregorian chants.
Hymns, Latin.
Motets.
Part songs, English.
Part songs, Latin.
Harvard subject headings:
Princeton subject headings:
Christmas music.
Music--England--15th century.
Music--England--500-1400.
Vocal quartets, Unaccompanied.