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Operation Ultra was designed to intercept & decode German signals sent using Enigma, the top-secret German cypher machine. F.W. Winterbotham, was the man responsible for the organization, distribution & security of Ultra. This is his personal account of the operation.
Buchkauf
The Ultra Secret, Frederick W. Winterbotham
- Sprache
- Erscheinungsdatum
- 1975
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- (Paperback)
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