Columbia subject headings:
German drama--20th century--History and criticism.
Political plays, German--History and criticism.
Political plays, German.
Theater--Germany--History--20th century.
Theater--Political aspects--Germany.
Harvard subject headings:
German drama--20th century--History and criticism.
Political plays, German--History and criticism.
Political plays, German.
Theater--Germany--History--20th century.
Theater--Political aspects--Germany.
Princeton subject headings:
German drama--20th century--History and criticism.
German drama--20th century.
Political plays--Germany--History and criticism.
Socialism and theater.
Theater--Germany--History.
Theater--Political aspects.