Columbia subject headings:
German poetry--20th century--History and criticism.
German poetry--20th century.
Harvard subject headings:
German poetry--20th century
German poetry--20th century--History and criticism
Princeton subject headings:
German poetry--20th century--History and criticism--Congresses.
German poetry--20th century.
Lyric poetry--History and criticism--Congresses.
Poetry, Modern--20th century--History and criticism--Congresses.