Allen, John. <br/><br/>
Telecommunications / 
John Allen. 
 - x, 117 pages. :illustrations ;   cm. 
<br/><br/> Includes appendices and index. 
<br/><br/><label>ISBN: </label>0174482167 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.