• Inventory number: 34290
  
• Language: en
  
• Type: b
  
• Call number: 652.8
  
• Author number: a259
  
• Title: codes and ciphers
  
• Author: agapeyeff alexander
  
• Place of publication and publisher: london:oxford university press
  
• Publication date: 1949
  
• Pages: 146
  
• Notes: include index
  
• Subject: processes of written communication
  

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