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