Before Enigma: The Room 40 Codebreakers of the First World War

by David Boyle

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  • ISBN10 1523360259
  • ISBN13 9781523360253
  • Publish Date 11 January 2016
  • Publish Status Active
  • Imprint Createspace Independent Publishing Platform
  • Format Paperback (US Trade)
  • Pages 118
  • Language English