Oppenheim, Alan V...[et al. ].  <br/><br/>
Signals and systems / 

 - New Delhi,  Pearson Education,  c2007. 
 - 977 p. ;  ill. ;  23 cm.  
<br/><br/><label>ISBN: </label>8177582623 
<br/><br/><label>Dewey Class. No.: </label>621.3822320