Langley, Graham. <br/><br/>
Telecommunications primer /  [Book]. 
Graham Langley. 
 - London :   Pitman,   1984  
 - vi, 153 p. :   ill. ;   25 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0273019805 
<br/><br/><label>LCCN: </label>85189512 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.
<br/><br/><label>Dewey Class. No.: </label>TK/5101  / LAN