International Electrotechnical Commission <br/><br/>
IEC: 60050-441 (Amendement 1) - 2000; International Electrotechnical vocabulary chapter 441: Switchgear, controlgear and fuses 

 - Geneva  IEC  2000 
 - 1-13 
<br/><br/><label>ISBN: </label>2-8318-5209-9 
<br/><br/><label>Universal Decimal Class. No.: </label> /