Institute of Electrical and Electronics Engineers, Inc. <br/><br/>
IEEE: C37.122 - 1993 (R2002) (Revision of IEEE Std C37.122.1983, includes IEEE Std C37.122a-1991); gas-insulated substations 

 - Newyork  IEEE  1993 
 - 146 
<br/><br/> Downloaded from the IEC website 
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