G LANGLEY <br/><br/>
TELECOMMUNICATION PRIMER 

 - 2 
 - DELHI  PENGUIN BOOKS  1990 
 - 182 
<br/><br/><label>ISBN: </label>NULL 
<br/><br/><label>Subjects--Topical Terms: </label><br/>NULL
<br/><br/><label>Dewey Class. No.: </label>630