Columbia subject headings:
English drama--Great Britain--20th century--History and criticism.
Incidental music--20th century--History and criticism.
Music in the theater.
Harvard subject headings:
English drama--20th century--History and criticism
English drama--Great Britain--20th century--History and criticism.
Incidental music--20th century--History and criticism.
Incidental music--Great Britain--20th century--History and criticism.
Music in the theater.
Princeton subject headings:
English drama--Great Britain--20th century--History and criticism.
Incidental music--20th century--History and criticism.
Music in the theater.