DIN ISO 11665-2-2013 环境辐射性测量.空气:氡-222.第2部分:其短暂寿命衰减产物的平均势测定α能量浓度综合测量方法(ISO 11665-2-2012)
Measurement of radioactivity in the environment - Air: radon-222 - Part 2: Integrated measurement method for determining average potential alpha energy concentration of its short-lived decay products (ISO 11665-2:2012)