Columbia subject headings:
Foreign trade regulation--Germany (East)
Foreign trade regulation--Germany (West)
Germany (East)--Commerce--Germany (West)
Germany (West)--Commerce--Germany (East)
Harvard subject headings:
Foreign trade regulation--Germany (East)
Foreign trade regulation--Germany (West)
Germany (East)--Commerce--Germany (West)
Germany (West)--Commerce--Germany (East)
Princeton subject headings: