Columbia subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied.
Motets.
Music--Manuscripts--Facsimiles.
Harvard subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied.
Motets.
Music--Manuscripts--Facsimiles
Princeton subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied.
Motets.
Music--Manuscripts--Facsimiles.