Analysis on the result of the 2018 national individual does monitoring system blind sample comparison in Ningxia
JI Xuli, KONG Qingyu, LU Guicai, SUN Yanling, LI Hongcheng
中国辐射卫生 . 2020, (2): 182 -184 .  DOI: 10.13491/j.issn.1004-714X.2020.02.021