John, W.J., Ed. <br/><br/>
Modern electrical engineering. Vol.III: Miscellaneous applications and aspects of electricity:Regulations,standards and codes of practice:Index 

 - London  Odhams Press Ltd.  1957 
 - 416p 
<br/><br/><label>Universal Decimal Class. No.: </label>621.3  / JOH,3.57