Columbia subject headings:
Brecht, Bertolt, 1898-1956--Criticism and interpretation.
Brecht, Bertolt, 1898-1956--Philosophy.
Harvard subject headings:
Brecht, Bertolt, 1898-1956--Criticism and interpretation.
Brecht, Bertolt, 1898-1956--Philosophy.
Princeton subject headings:
Brecht, Bertolt, 1898-1956--Criticism and interpretation.