Bellamy J. C., <br/><br/>
Digital Telephony 3rd ed  Textual Documents 

 - 3rd ed. 
 - New Delhi  Wiley India Pvt. Ltd.,  2014 
 - xxv/643:  p.b.;  23*15. 
<br/><br/><label>ISBN: </label>9788126509294   
<br/><br/><label>Subjects--Index Terms: </label>Telecommunication & Switching Systems 
<br/><br/><label>Dewey Class. No.: </label>621.385  / BEL