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Codes, Ciphers and Secret Writing

Pocket
Engelsk
Dover Children's Activity Books
Codes, Ciphers and Secret Writing
Codes, Ciphers and Secret Writing
  • Forfatter: Martin Gardner
  • Format: Pocket
  • Antall sider: 96
  • Språk: Engelsk
  • Forlag/Utgiver: SD Books
  • Serienavn: Dover Children's Activity Books
  • EAN: 9780486247618
  • Utgivelsesår: 2003
  • Bidragsyter: Gardner, Martin
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"A fascinating, challenging book." ¿ A. L. A. Booklist. Experiment with cryptography ¿ the science of secret writing. Cipher and decipher codes: transposition and polyalphabetical ciphers, famous codes, typewriter and telephone codes, codes that use playing cards, knots, and swizzle sticks...even invisible writing and sending messages through outer space. Hours of intrigue and challenge. 45 diagrams.