Oppenheim, Alan W...et.al. <br/><br/>
Signals and systems / 

 - 2nd.  
 - New Delhi,   Prentices Hall,   c2007. 
 - xxx, 957p. ;  ill ;  24 cm.  
<br/><br/><label>ISBN: </label>9788120312463 
<br/><br/><label>Dewey Class. No.: </label>621.3822320