IEC: 50(421) First edition- 1990-10; International Electrotechnical vocabulary chapter 421: power transformers and reactors
International Electrotechnical Commission
IEC: 50(421) First edition- 1990-10; International Electrotechnical vocabulary chapter 421: power transformers and reactors - 1 - Geneva IEC 1990 - 57
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IEC: 50(421) First edition- 1990-10; International Electrotechnical vocabulary chapter 421: power transformers and reactors - 1 - Geneva IEC 1990 - 57
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