Columbia subject headings:
Harvard subject headings:
Electronic intelligence--Germany (West)--History--20th century.
Germany (West). Bundesnachrichtendienst--History.
Military intelligence--Germany (West)--History--20th century.
Organisation Gehlen.
Radio in espionage--Germany (West)--History--20th century.
Princeton subject headings:
Electronic intelligence--Germany (West)--History--20th century.
Germany (West). Bundesnachrichtendienst--History.
Military intelligence--Germany (West)--History--20th century.
Organisation Gehlen.
Radio in espionage--Germany (West)--History--20th century.