Roddy, Dennis. <br/><br/>
Electronic Communications / 
Dennis Roddy and John Coolen. 
 - 4th ed. 
 - New Delhi :  Dorling Kindersley (India) Pvt. Ltd.,  c2008. 
 - xi,723p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/>
<br/><br/><br/>english 
<br/><br/><label>ISBN: </label>9788177585582 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communications
<br/><br/><label>Dewey Class. No.: </label>621.38205/ROE