Columbia subject headings:
Harvard subject headings:
Convict labor--Germany (East)--History.
Deutsche Reichsbahn (Germany : East)--History.
Forced labor--Germany (East)--History.
Political persecution--Germany (East)--History.
Railroads and state--Germany (East)--History.
Princeton subject headings:
Convict labor--Germany (East)--History.
Deutsche Reichsbahn (Germany : East)--History.
Forced labor--Germany (East)--History.
Political persecution--Germany (East)--History.
Railroads and state--Germany (East)--History.