Graham, John <br/><br/>
Penguin dictionary of telecommunications  [Books]. 
John Graham 
 - Harmondsworth, Middlesex  UNKNOWN PUBLISHER  1985 
 - Pages: 200 
<br/><br/><label>ISBN: </label>0140511075  0.00 
<br/><br/><label>Dewey Class. No.: </label>TK/5102  / GRA