Columbia subject headings:
Hauptmann, Carl, 1858-1921.
Hauptmann, Gerhart, 1862-1946.
Harvard subject headings:
Hauptmann, Carl, 1858-1921
Hauptmann, Gerhart, 1862-1946
Princeton subject headings:
Hauptmann, Carl, 1858-1921.
Hauptmann, Gerhart, 1862-1946.