Columbia subject headings:
Choral music--Analysis, appreciation.
Choral music--Bibliography.
Composers.
Music--20th century--History and criticism.
Harvard subject headings:
Choral music--Analysis, appreciation
Choral music--Bibliography.
Composers
Music--20th century--History and criticism
Princeton subject headings:
Choral music--Analysis, appreciation.
Choral music--Bibliography.
Composers.
Music--20th century--History and criticism.