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J. C. Hawtin

2 published titles

Codes and ciphers

1 edition

  • ISBN: 0721407935
  • Ladybird
  • 1983
  • Details

Secret messages : a collection of puzzles using codes and ciphers

1 edition

  • ISBN: 0906212782
  • Tarquin
  • 1990
  • Details

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