Signalling II /  [Books]. 
Eric Coles, editor. 
 - Cambridge :   National Extension College (NEC),   1982. 
 - various pages :   ill ;   22cm. 
 - Technical Training Packs .
<br/><br/><label>ISBN: </label>0860825353 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Signal processing.