Das, J...et,al <br/><br/>
Principles of digital communication / 

 - New Delhi,   New Age International,  c2007. 
 - xiii, 645 p. ;  ill. ;  23 cm.  
<br/><br/><label>ISBN: </label>0852261500 
<br/><br/><label>Dewey Class. No.: </label>621.3819