Roddy, Dennis. <br/><br/>
Electronic communications 
Dennis Roddy and John Coolen 
 - 4th ed. 
 - New Delhi:  Prentice Hall of India,  1999 
 - ix, 820p. 
<br/><br/><label>ISBN: </label>9788120309845 
<br/><br/><label>Standard No.: </label>590  [RecID from old SOUL v2 database]