Roddy; Coolen <br/><br/>
Electronic Communications / 
Roddy/ Coolen 
 - 4th Edition 
 - Chennai :  Pearson ,  2013 
 - 723 pages 
<br/><br/><label>ISBN: </label>9788177585582 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English
<br/><br/><label>Dewey Class. No.: </label>621.380413  / ROD