Columbia subject headings:
Aesthetics, German--20th century.
German literature--20th century--History and criticism.
Literature--Aesthetics.
Poetics.
Harvard subject headings:
Aesthetics, German--20th century.
German literature--20th century--History and criticism
Literature--Aesthetics
Literature--Philosophy
Music and literature.
Music--Philosophy and aesthetics
Poetics
Princeton subject headings:
Aesthetics, German--20th century.
German literature--20th century--History and criticism.
Literature--Aesthetics.
Literature--Philosophy.
Music and literature.
Music--Philosophy and aesthetics.
Poetics.