8[15]Kozlowska B, Hetman A, Zipper W. Determination of 222Rn in natural water samples from health resorts in the Sudety Mountains by the liquid scintillation technique[J]. Applied Radiation and Isotopes, 1999,51 (4): 475-480.
9[16]Horváth á, Bohus LO, Urbani F, Marx G, Piróth A, Greaves ED. Radon concentrations in hot spring waters in northern Venezuela [J]. Journal of Environmental Radioactivity, 2000,47 (2): 127-133.
10[17]Sabol J, Weng Pao-shan, Mao Cheng-Hisn. Monitoring of 222Rn in Taiwan Residents hot spring spa waters using a modified electrets ion chamber method[J]. Health Phys, 1995,68(1 ): 100-104.
