Aljamil, R. O., R. M. Yousuf, and N. A. Hamdoon. “Estimation of Radon-Gas, Uranium-238 Concentrations in the Surface Soil Samples and Alpha Risk Index at Many Northern Iraqi Refineries”. International Journal of Health Sciences, vol. 6, no. S9, Sept. 2022, pp. 2890-05, doi:10.53730/ijhs.v6nS9.13154.