Columbia subject headings:
Harvard subject headings:
Authors, German--20th century--Political and social views--Congresses.
German literature--20th century--History and criticism--Congresses
Germany--History--Revolution, 1918--Congresses.
Princeton subject headings:
German literature--20th century--Themes, motives--Congresses.
Germany--History--Revolution, 1918--In literature--Congresses.
Germany--History--Revolution, 1918--In mass media--Congresses.