Columbia subject headings:
Art music.
Choruses, Sacred (Mixed voices, 8 parts), Unaccompanied.
Sacred vocal octets, Unaccompanied.
Scores.
Harvard subject headings:
Choruses, Sacred (Mixed voices, 8 parts), Unaccompanied.
Microtonal music.
Sacred octets, Unaccompanied.
Princeton subject headings:
Choruses, Sacred (Mixed voices, 8 parts), Unaccompanied.
Sacred octets, Unaccompanied.