International Electrotechnical Commission <br/><br/>
IEC/TR: 62055-21(Ed-1.0) - 2005-08; Electricity Metering - Payment Systems - Part 21 - Framework for Standardization 

 - 1.0 
 - Geneva  IEC  2005 
 - 107 
<br/><br/><label>Universal Decimal Class. No.: </label> /