Hall, Stanley <br/><br/>
Modern signalling handbook / 
by Stanley Hall 
 - 2nd ed. 
 - London :  Lan Allan,  1996. 
<br/><br/><label>ISBN: </label>0711024715  £7.99 
<br/><br/><label>Subjects--Index Terms: </label>Signals - Handbook 
<br/><br/><label>Dewey Class. No.: </label>625.1650941