DIN ISO 11665-4-2013 环境辐射性测量.空气:氡-222.第4部分:利用被动采样和延迟分析测定平均活性浓度的综合测量方法(ISO 11665-4-2012)
Measurement of radioactivity in the environment - Air: radon-222 - Part 4: Integrated measurement method for determining average activity concentration using passive sampling and delayed analysis (ISO 11665-4:2012)