Roberts, Michael J. <br/><br/>
Fundamentals of signals and systems. 

 - New Delhi  McGraw-Hill,  2008. 
 - xix; 761 p. 
<br/><br/><label>ISBN: </label>0070648549 (paperback) 9780070648548 (paperback) 
<br/><br/><label>Source: </label> 6.50 US$