Columbia subject headings:
Harvard subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied
Gregorian chants
Gregorian chants.
Masses, Unaccompanied
Motets
Motets.
Part songs, French
Polyphonic chansons
Polyphonic chansons.
Princeton subject headings:
Masses, Unaccompanied.
Motets.
Polyphonic chansons.