Columbia subject headings:
Harvard subject headings:
Authors, European--20th century.
European literature--20th century--History and criticism.
Literature--Philosophy
Philosophers, Modern--Europe.
Philosophy, European--20th century.
Poets--20th century.
Princeton subject headings:
Authors, European--20th century.
European literature--20th century--History and criticism.
Literature--Philosophy.
Philosophers, Modern--Europe.
Philosophy, European--20th century.
Poets--20th century.