Columbia subject headings:
Austrian drama--20th century--History and criticism.
German drama--20th century--History and criticism.
Swiss drama (German)--20th century--History and criticism.
Harvard subject headings:
Austrian drama--20th century--History and criticism.
German drama--20th century--History and criticism.
Swiss drama (German)--20th century--History and criticism.
Swiss drama--20th century--History and criticism.
Princeton subject headings:
German drama--20th century.