Columbia subject headings:
Harvard subject headings:
German drama--19th century--History and criticism.
German drama--20th century--History and criticism.
Hauptmann, Gerhart, 1862-1946--Criticism and interpretation.
Hauptmann, Gerhart, 1862-1946--Friends and associates.
Princeton subject headings:
Hauptmann, Gerhart, 1862-1946--Criticism and interpretation.