Columbia subject headings:
Harvard subject headings:
Poetry, Modern--History and criticism
Princeton subject headings:
Benjamin, Walter, 1892-1940--Criticism and interpretation.
Brecht, Bertolt, 1898-1956--Criticism and interpretation.
Celan, Paul--Criticism and interpretation.
Mallarmé, Stéphane, 1842-1898--Criticism and interpretation.
Poetry, Modern--20th century--History and criticism.