• Inventory number: 373799
  
• Language: en
  
• Type: b
  
• Call number: 652.9
  
• Author number: w946
  
• ISBN: 0-245-54880-7
  
• Title: codes ciphers and languages
  
• Author: wrixon,fred b
  
• Place of publication and publisher: london:harrap
  
• Publication date: 1989
  
• Pages: 266
  
• Notes: include bibliography
  
• Subject: processes of written communication
  

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