Columbia subject headings:
Anarchism--Germany--History.
Anti-Nazi movement--Germany--History.
Labor unions--Political activity--Germany--History.
Socialism--Germany--History.
Working class--Political activity--Germany--History.
Harvard subject headings:
Anarchism--Germany--History.
Anarchists--Germany--History--20th century.
Anti-Nazi movement--Germany--History--20th century.
Communists--Germany--History--20th century.
Forced labor--Germany--History--20th century
Labor movement--Germany--History--20th century
Labor unions--Political activity--Germany--History--20th century.
Labor unions--Political activity--Germany--History.
Socialism--Germany
Socialists--Germany--History--20th century.
Working class--Political activity--Germany--History.
Princeton subject headings:
Anarchism.
Anti-Nazi movement--Germany--History.
Labor unions--Political activity.
Socialism--Germany--History.
Working class--Political activity.