Centre for Maritime Historical Studies
Rasor Bibliography
View entry no. 25340
Full entry text:
Winterbotham, Frederick William. The Ultra Secret. New York: Dell; New York: Harper; London: Weidenfeld & Stoughton, 1974, 1975, 1999, 286 pp. Popular bestseller; credited with 1st breaking decades-long secret, Ultra & Bletchley Park.
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