Roddy, Dennis. <br/><br/>
Electronic Communications /  
by Dennis Roddyby John Coolen. 
 - 4th ed /  
 - New Delhi :   Prentice-Hall of India Pvt. Ltd. ,   1997 
 - 820p :  
<br/><br/><label>ISBN: </label>81-203-0984-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>IT
<br/><br/><label>Dewey Class. No.: </label>BV  / N5