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"Die Chiffriermaschine Enigma - trügerische Sicherheit: ein Beitrag ..."
Heinz Ulbricht (2005)
- Heinz Ulbricht:
Die Chiffriermaschine Enigma - trügerische Sicherheit: ein Beitrag zur Geschichte der Nachrichtendienste. Braunschweig University of Technology, Germany, 2005, pp. 1-206
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