Gopalan, K. Gopal, <br/><br/>
Signals and systems 

 -  Inidian Edition. 
 - New Delhi  Cengage Learning  2009. 
 - xv, 655 p:  ill;  24 cm. 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9788131510872 
<br/><br/><label>Dewey Class. No.: </label>621.3 GOP