Sharma,Sanjay <br/><br/>
Communication systems( analog & digital) / 
Sharma,Sanjay. 
 - 4th ed. 
 - New Delhi:  S.K.Kataria & sons,  2006. 
 - 972p;26cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>8188458201 
<br/><br/><label>Dewey Class. No.: </label>621.382 HAY