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EVS-EN 50341-2-20:2018 Elektriõhuliinid vahelduvpingega üle 1 kV. Osa 2-20, Eesti riiklikud erinõuded (SEN) = Overhead electrical lines exceeding AC 1 kV. Part 2-20, National Normative Aspects (NNA) for Estonia (based on EN 50341-1:2012)
Compiler: Peeter Raesaar, Tiit Metusala, Priit Jürgenson, Juhan Karin, Henri Manninen, Tõnu Müürsepp, Toomas Raudsepp, Raivo Rebane, Risto Rusin, Author: Eesti Standardikeskus
Health in the Baltic countries ; 2014 (23rd edition)Tervise Arengu Instituut, Eesti Meditsiinistatistika Büroo, Eesti. Sotsiaalministeerium.Statistika- ja analüüsi osakond, Centre for Disease Prevention and Control of Latvia, Lithuanian Health Information Centre