Columbia subject headings:
Hauptmann, Gerhart, 1862-1946--Criticism and interpretation--Congresses.
Music and literature--Congresses.
Harvard subject headings:
Hauptmann, Gerhart, 1862-1946--Criticism and interpretation--Congresses.
Hauptmann, Gerhart, 1862-1946--Knowledge--Music--Congresses.
Music and literature--History--20th century--Congresses.
Princeton subject headings:
Hauptmann, Gerhart, 1862-1946--Criticism and interpretation--Congresses.
Music and literature--Congresses.