Before Bletchley Park. The Codebreakers of the First World War, 2 ed, Paperback/Paul Gannon

A fully revised and updated account of the author's acclaimed book Inside Room 40 Publisher: The History Press Ltd Author(s): Paul Gannon Illustration(s): Plates, black and white; 20 Illustrations, black and white Publication date: 2022 Dimensions: 234 x 156 x 31 Cover type: Paperback / softback