Columbia subject headings:
Anti-Nazi movement--Germany.
Political refugees--Germany.
Working class--Political activity--Germany.
Harvard subject headings:
Germany--Politics and government--1933-1945.
Labor--Germany--Political activity--History.
National socialism--History.
Political refugees--Germany.
Working class--Germany--Political activity--History.
Princeton subject headings:
Anti-Nazi movement--Germany.
Political refugees--Germany.
Working class--Germany--Political activity.