IEC 61577-4:2009
辐射防护仪表.氡和氡降解产品的测量仪器.第4部分:包含氡同位素及其降解产品的参考环境制品用设备(STAR)
Radiation protection instrumentation - Radon and radon decay product measuring instruments - Part 4: Equipment for the production of reference atmospheres containing radon isotopes and their decay products (STAR)