IEC <br/><br/>
IEC: 60079-10-2002; Electrical apparatus for explosive gas atmosphers Part 10; Classification of hazardous areas 

 - 4 
 - Geneva  International Electrotechnical Commisssion  2002 
 - 115 
<br/><br/><label>ISBN: </label>2-8318-6379-1 
<br/><br/><label>Universal Decimal Class. No.: </label> /