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