International Electrotechnical Commission <br/><br/>
IEC: 61811-10(Ed.1.0) - 2002; Electromechanical elementary relays of assessed quality- part 10: Sectional specification- Relays for industries application 

 - 1st ed. 
 - Geneva  IEC  2002 
 - 2-21 
<br/><br/><label>ISBN: </label>2-8318-6750-9 
<br/><br/><label>Universal Decimal Class. No.: </label> /