Oppenheim, Alan V. <br/><br/>
Signals and systems   
by Alan V. Oppenheim (...) 
 - New Delhi  PHI  1987 
 - xix, 796p. 
 - Prentice-Hall signal processing series .
<br/><br/><label>ISBN: </label>0876925034 
<br/><br/><label>Dewey Class. No.: </label>621.38043  / N879