“Measurement of Radon-222 Concentration in Soil Samples of Some Sulfuric Spring in Hit City Using CR-39 Detector”. Baghdad Science Journal 8, no. 4 (December 4, 2011): 972–975. Accessed May 1, 2024. https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/1318.