Graham, Ian <br/><br/>
Global networks / 
Ian Graham 
 - 46p. :  ill. (col.) 
 - Communications  close-up series .
<br/><br/> Originally published: 2000 
<br/><br/><label>ISBN: </label>9780237526290 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication systems --Juvenile literature.<br/>Telecommunication systems
<br/><br/><label>LC Class. No.: </label>TK5102 GRA 2000