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The Ultra Secret
The Ultra Secret
Author: F. W. Winterbotham
Operation Ultra was designed to intercept and decode German signals sent using Enigma, the top-secret German cypher machine. F.W. Winterbotham, was the man responsible for the organization, distribution and security of Ultra. This is his personal account of the operation.
ISBN-13: 9785557022422
ISBN-10: 5557022422
Edition: Unabridged
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Publisher: Books on Tape
Book Type: Audio Cassette
Other Versions: Paperback, Hardcover
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