Columbia subject headings:
Gregorian chants.
Mary, Blessed Virgin, Saint--Songs and music.
Masses, Unaccompanied.
Part songs, Dutch.
Polyphonic chansons.
Harvard subject headings:
Gregorian chants.
Mary Magdalene, Saint--Songs and music.
Part songs, Dutch
Polyphonic chansons
Princeton subject headings:
Gregorian chants.
Mary Magdalene, Saint--Songs and music.
Masses, Unaccompanied.
Part songs, Dutch.
Polyphonic chansons.