SEERC Kiev Conference-2018Sound Levels of Power Transformers and Reactors in the UHV Substations-SelimYurekten indirPT-0103-KYIV-2018 indirPT-0093-KYIV-2018 indirKIEV Seerc Makale indir0103-KYIV-2018 indir0093-KYIV-2018 indir