Columbia subject headings:
German literature--20th century--History and criticism--Congresses.
German literature--Germany (East)--History and criticism--Congresses.
Germany (East)--In literature--Congresses.
Harvard subject headings:
German literature--20th century--History and criticism--Congresses
Germany (East)--Literatures--History and criticism--Congresses.
Princeton subject headings:
German literature--20th century--History and criticism--Congresses.
Germany (East)--Literatures--History and criticism--Congresses.