GRIFFITHS, J. M. <br/><br/>
LOCAL TELECOMMUNICATIONS 

 - S.E. 
 - S.L. Sin Pais  PERE  1983 
 - 262 
<br/><br/><label>ISBN: </label>0906048931 
<br/><br/><label>LCCN: </label>17609 
<br/><br/><label>Dewey Class. No.: </label>621.3857