• Inventory number: 19073
  
• Language: EN
  
• Type: B
  
• Call number: 621.385
  
• Author number: S187
  
• Title: TELEGRAPHY &TELEPHONY
  
• Place of publication and publisher: POST OFFICE ENGINEERING DEPARTEMENT
  
• Subject: WIRE TELEPHONY
  
• Number of copies: 01
  

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