Columbia subject headings:
Harvard subject headings:
Convict labor--Germany (East)
Forced labor--Germany (East)
Germany (East)--Commerce--Germany (West)
Germany (West)--Commerce--Germany (East)
Work environment--Germany (East)
Princeton subject headings:
Convict labor--Germany (East).
Forced labor--Germany (East).
Germany (East)--Commerce--Germany (West).
Germany (West)--Commerce--Germany (East).
Work environment--Germany (East).