Redmill, F J  <br/><br/>
SPC digital telephone exchanges  

 - London:   Peter Peregrinus Ltd.,   1994 
 - xii, 521p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication 
<br/><br/><label>Subjects--Index Terms: </label>Science  
<br/><br/><label>Universal Decimal Class. No.: </label>621.395  / N4