Columbia subject headings:
Composers.
Music--20th century--History and criticism.
Musicologists.
Musicology--History--20th century.
Harvard subject headings:
Composers
Music--20th century--History and criticism
Musicologists.
Musicology--History--20th century.
Princeton subject headings:
Composers.
Music--20th century--History and criticism.
Musicologists.
Musicology--History.