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Before Bletchley Park: The Codebreakers of the First World War Paul Gannon 2nd edition
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Before Bletchley Park: The Codebreakers of the First World War
Paul Gannon
A fully revised and updated account of the author's acclaimed book Inside Room 40
352 pages, Plates, black and white; 20 Illustrations, black and white
| Media | Books Paperback Book (Book with soft cover and glued back) |
| Released | July 28, 2022 |
| ISBN13 | 9781803990064 |
| Publishers | The History Press Ltd |
| Dimensions | 156 × 234 × 31 mm · 574 g |
| Language | English |
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