• Inventory number: 333098
  
• Call number: 681,76
  
• Author number: P976
  
• Title: PUBLIC EXCHANGE CONVERSIONS PART 1 METHOD OF TRANSFER TO AN AUTOMATIC EXCHANGE
  
• Place of publication and publisher: LONDON:POST OFFICE ENGINEERING DEPARTMENT
  
• Publication date: 1931
  
• Pages: 41P.
  
• Series: TECHMICAL INSTRUCTIONS;34
  
• Notes: INC.FIGURES;INDEX40-41P.
  
• Subject: TECHNOLOGICAL INSTRUMENTS
  
• Number of copies: 01
  

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