Beasely, Jeffery S <br/><br/>
Modern electronic communication 

 - 8th ed 
 - Newdelhi  Prentice hall of India  2005 
 - 923p 
<br/><br/><label>ISBN: </label>8120330455 
<br/><br/><label>Dewey Class. No.: </label>621.382  / BEA