Columbia subject headings:
Aesthetics, Modern--20th century.
Arts, Modern--20th century.
Bloch, Ernst, 1885-1977--Aesthetics.
Brecht, Bertolt, 1898-1956--Aesthetics.
Expressionism (Art)
Surrealism.
Harvard subject headings:
Aesthetics, Modern--20th century.
Arts, Modern--20th century
Bloch, Ernst, 1885-1977--Aesthetics.
Brecht, Bertolt, 1898-1956--Aesthetics.
Expressionism (Art)
Surrealism.
Princeton subject headings: