Roddy, Dennis <br/><br/>
Electronic communications/4th ed. 

 - New Delhi  Prentice Hall of India  2013 
 - 719p. 
<br/><br/><label>ISBN: </label>81-203-0984-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>621.39--Telecommunication
<br/><br/><label>Universal Decimal Class. No.: </label>621.39  / ROD