Graham, John. <br/><br/>
The Penguin dictionary of telecommunications / 
John Graham 
 - London :   Allen Lane,   c1983. 
 - 199 p.:  ill. ;  19 cm. 
<br/><br/>
<br/><br/><br/>English. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication<br/>Telecommunication systems
<br/><br/><label>Dewey Class. No.: </label>621.380321/GRP