Columbia subject headings:
Expressionism in literature.
German drama--20th century--History and criticism.
Social problems in literature.
Utopias in literature.
Harvard subject headings:
Expressionism
German drama--20th century--History and criticism.
Social problems in literature.
Utopias in literature.
Princeton subject headings:
Expressionism.
German drama--20th century--History and criticism.
Social problems in literature.
Utopias in literature.