Columbia subject headings:
Harvard subject headings:
Gregorian chants.
Hymns, Latin.
Mary, Blessed Virgin, Saint--Songs and music.
Masses, Unaccompanied.
Motets.
Part songs, English.
Princeton subject headings:
Conductus.
Feast of the Assumption of the Blessed Virgin Mary--Songs and music.
Gregorian chants.
Masses, Unaccompanied.
Motets.
Music--England--500-1400.