How Code Breakers Work

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  • Kahn, David. "The Code-Breakers." Macmillan Publishing Co., Inc.
    New York. 1967.
  • Kozaczuk, Wladyslaw. "Enigma." University Publications of
    America, Inc. 1985.
  • Pincock, Stephen. "Codebreaker." Walker & Company.
    New York. 2006.
  • Sutherland, Scott. "An Introduction to Cryptography."
    October 14, 2005.
  • The Enigma Cipher Machine