Columbia subject headings:
Popular culture in literature.
Radio plays--History and criticism--20th century.
Radio--History--20th century.
Harvard subject headings:
German drama--20th century--History and criticism
Popular culture--Germany--History--20th century
Popular music--20th century--History and criticism.
Radio plays, German--20th century--History and criticism.
Princeton subject headings:
German drama--20th century--History and criticism.
Popular culture--Germany.