Vishwanathan T., & Bhatnagar M <br/><br/>
Telecommunication Switching Syatems and Networks  Textual Documents  
Vishwanathan T., & Bhatnagar M 
 - 1st ED 
 -  PHI Learning PVT. Ltd. Pub.  2015 
 - 620 
<br/><br/><label>ISBN: </label>978-81-203-5083-0   
<br/><br/><label>Dewey Class. No.: </label>621.382