Columbia subject headings:
Brecht, Bertolt, 1898-1956--Criticism and interpretation.
German literature--History and cricitism.
Harvard subject headings:
Brecht, Bertolt, 1898-1956--Archives--Congresses.
Brecht, Bertolt, 1898-1956--Criticism and interpretation--Congresses.
Unfinished books--Germany--Archival resources--Congresses.
Princeton subject headings:
Brecht, Bertolt, 1898-1956--Criticism and interpretation.