• Inventory number: 12739
  
• Language: en
  
• Type: b
  
• Call number: 621.385
  
• Author number: j25
  
• Title: principles of telephony
  
• Author: jain,a.k
  
• Place of publication and publisher: new delhi:new hights
  
• Publication date: 1980
  
• Pages: 259
  
• Notes: include illustration figure table
  
• Subject: applied physics
  

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