Technology: A third level course telecommunication systems,channels and lines i, channels and lines ii 

 - Milton Keynes  Open University Press  1976 
 - pp. 
<br/><br/><label>ISBN: </label> RS 2.75 
<br/><br/><label>Source: </label> RS 2.75 
<br/><br/><label>Dewey Class. No.: </label>621.38 TEC