Columbia subject headings:
Books of hours.
Catholic Church--Prayers and devotions.
Gregorian chants.
Harvard subject headings:
Mary, Blessed Virgin, Saint--Songs and music.
Motets
Motets.
Polyphonic chansons
Rondeaux (Formes fixes)
Rondeaux (Polyphonic chansons)
Princeton subject headings:
Antiphons (Music)
Magnificat (Music)
Motets.
Rondeaux (Polyphonic chansons)