Roddy,  Dennis <br/><br/>
Electronic communications / 
Dennis Roddy, John Coolen 
 - 4th ed. 
 - New Delhi :  Prentice Hall India,  2009 
 - ix, 820 p. :  ill. ;  26 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>8120309847 9788120309845 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication