Allen, John. <br/><br/>
Telecommunications / 
John Allen. 
 - ed. 
 - Walton-on-Thames, England :  Nelson,  1990. 
 - ix, 117  p. 
<br/><br/><label>ISBN: </label>0174482167 :  KES 1110 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication systems.