BS ISO 11665-2-2012
环境中放射性的测量. 空气: 氡-222. 其短暂寿命衰减产物的平均势测定阿尔法能量浓度综合测量方法
Measurement of radioactivity in the environment. Air: radon-222. Integrated measurement method for determining average potential alpha energy concentration of its short-lived decay products