DIN EN ISO 11665-5-2015 环境辐射性测量.空气:氡-222.第5部分:放射性浓度连续测量法(ISO 11665-5-2012);德文版本EN ISO 11665-5-2015
Measurement of radioactivity in the environment - Air: radon-222 - Part 5: Continuous measurement method of the activity concentration (ISO 11665-5:2012); German version EN ISO 11665-5:2015