Columbia subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied.
Music--15th century.
Music--16th century.
Harvard subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied.
Music--15th century
Music--16th century
Princeton subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied.
Music--15th century.
Music--16th century.