P Gnanasivam <br/><br/>
Telecommunication switching and networks 

 - 2 nd ed 
 - delhi 
<br/><br/><label>ISBN: </label>9788122419504 
<br/><br/><label>Nat. Bib. No.: </label> electrical 
<br/><br/><label>LC Class. No.: </label>621.3821 Gna 
<br/><br/><label>Dewey Class. No.: </label>621.3821 Gna