Langley, Graham <br/><br/>
Telecommunications  primer 

 - 4th ed. 
 - England:  Pearson education,  1998 
 - v, 198p.;  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COMMUNICATIONS ENGINEERING
<br/><br/><label>Dewey Class. No.: </label>621.382  / LAN