Columbia subject headings:
Harvard subject headings:
Brecht, Bertolt, 1898-1956--Criticism and interpretation.
Dürrenmatt, Friedrich--Criticism and interpretation.
Frisch, Max, 1911-1991--Criticism and interpretation.
German literature--20th century--History and criticism
Princeton subject headings:
Brecht, Bertolt, 1898-1956--Criticism and interpretation.
Dürrenmatt, Friedrich--Criticism and interpretation.
Frisch, Max, 1911---Criticism and interpretation.