Kareem, I. M., L. A. Abdulkareem, and H. I. Al-Barudi. “Surface and Deep Soil 222Rn Gas Exhalation Comparison: A Case Study in Tawke, Duhok, Northern Iraq”. Engineering, Technology & Applied Science Research 9, no. 5 (October 9, 2019): 4741–4744. Accessed December 24, 2024. https://etasr.com/index.php/ETASR/article/view/3086.