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Did you mean chang h choon (22 results)?
Radon concentrations in the community groundwater system of South Korea.
Cho BW, Kim HK, Kim MS, Hwang JH, Yoon U, Cho SY, Choo CO. Cho BW, et al. Among authors: choo co. Environ Monit Assess. 2019 Feb 26;191(3):189. doi: 10.1007/s10661-019-7301-y. Environ Monit Assess. 2019. PMID: 30806813
Natural radon reduction rate of the community groundwater system in South Korea.
Yun U, Seong Kim T, Kim HK, Kim MS, Cho SY, Choo CO, Cho BW. Yun U, et al. Among authors: choo co. Appl Radiat Isot. 2017 Aug;126:23-25. doi: 10.1016/j.apradiso.2017.01.048. Epub 2017 Feb 7. Appl Radiat Isot. 2017. PMID: 28189391