Couch, Leon W. <br/><br/>
Digital and Analog Communication Systems / 
Leon W. Couch 
 - 7th ed 
 - Delhi:  Pearson ,  2009 
<br/><br/><label>ISBN: </label>813172543X,  435.00 
<br/><br/><label>Dewey Class. No.: </label>621.382  / C853