Roddy, Dennis <br/><br/>
Electronic communication .4th ed. 
By  Dennis Roddy 
 -  Praintice hall india. 
<br/><br/> Engineering 
<br/><br/><label>ISBN: </label>8-1203-0984-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronics