Columbia subject headings:
Harvard subject headings:
Authors, German--20th century--Political and social views
Bund Proletarisch-Revolutionärer Schriftsteller Deutschlands.
Princeton subject headings:
Authors, German--20th century--Biography.
Authors, German--20th century--Political and social views.
Bund Proletarisch-Revolutionärer Schriftsteller Deutschlands--History.
Germany--Politics and government--1918-1933.