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EVS-ISO 11665-11:2018 Radioaktiivsuse mõõtmine keskkonnas : õhk : radoon-222. Osa 11, Pinnaseõhu kontrollimeetod proovivõtuga sügavusest = Measurement of radioactivity in the environment : air : radon-222. Part 11, Test method for soil gas with samplin...
Eesti Standardikeskus, Eesti. Keskkonnaministeerium