Blake, Roy <br/><br/>
Electronic communication systems .-2nd ed .-978-81-315-1841-0 

 - 2nd ed 
 - Cengage Learning  Andover  2012 
 - xx,963 
<br/><br/>
<br/><br/><br/>E 
<br/><br/><label>Universal Decimal Class. No.: </label>621.380413