Aljamil, R. O., Yousuf, R. M., & Hamdoon, N. A. (2022). 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, 6(S9), 2890–2905. https://doi.org/10.53730/ijhs.v6nS9.13154