Local telecommunications 2 :  into the digital era / 
edited by J. M. Griffiths 
 - rev. ed. 
 - London :  Peter Peregrinus,  1988 
 - 320 p. ;  24 cm. 
 - IEE telecommunications series  v.17 .
<br/><br/><label>ISBN: </label>0863410804 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telephone--United Kingdom<br/>Telecommunication systems--United Kingdom