Dennis, Roddy & John, Coolen <br/><br/>
Electrocnic communications 

 - 3rd ed 
 - Prentice Hall of india, New Delhi  1987 
 - xii788 
<br/><br/><label>ISBN: </label>0-87692-396-1 
<br/><br/><label>Dewey Class. No.: </label>621.38 Rod/Coo