| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Ultra Secret: The Inside Story of Operation Ultra, Bletchley Park and Enigma | 978-O-7528-3751-2 (O-7528-3751-6) | 2000 |
F W · F.W. Winterbotham · Frederick W. · Frederick William Winterbotham · Frederick Winterbotham · W.W.