Columbia subject headings:
Gehlen, Reinhard, 1902-1979.
Germany (West). Bundesnachrichtendienst.
Organisation Gehlen.
Harvard subject headings:
Gehlen, Reinhard, 1902-
Germany (West). Bundesnachrichtendienst.
Organisation Gehlen.
Princeton subject headings:
Gehlen, Reinhard, 1902-1979.
Germany (West). Bundesnachrichtendienst
Organisation Gehlen.