Held, G <br/><br/>
Voice & data internetworking 

 - 3rd edition. 
 - New Delhi :  Tata Mcgraw-Hill Pub,  2001. 
 - xviii,397 
<br/><br/><label>ISBN: </label>0-07-044744-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrical Electronics Communication,
<br/><br/><label>Dewey Class. No.: </label>621.382  / HEL