Columbia subject headings:
Harvard subject headings:
Anti-Nazi movement--Germany--History
Germany--History--1933-1945.
Government, Resistance to--Germany--History--20th century.
National socialism--History.
Opposition (Political science)--Germany.
Railroads--Germany--Employees--History--20th century.
Princeton subject headings:
Anti-Nazi movement.
Railroads--Employees--Political activity--Germany--History--20th century.