Columbia subject headings:
Harvard subject headings:
Actors--Germany--20th century--Congresses.
Gründgens, Gustaf--Congresses.
Mann, Erika, 1905-1969--Congresses.
Mann, Klaus, 1906-1949--Congresses.
Theater--Germany--History--20th century--Congresses.
Princeton subject headings:
Gründgens, Gustaf--Criticism and interpretation.--Congresses.