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EVS-EN 61869-3:2012 Mõõtetrafod. Osa 3, Lisanõuded induktiivpingetrafodele = Instrument transformers. Part 3, Additional requirements for inductive voltage transformers (IEC 61869-3:2011)
Translator: Rein Oidram, Author: Eesti Standardikeskus
Acta historica Tallinnensia ; 17Eesti Teaduste Akadeemia, Tallinna Ülikool. Ajaloo Instituut, arheoloogia ja kunstiajaloo keskus Tallinna Ülikool. Ajaloo, Tartu Ülikool