Measurement of radon gas concentration in water and soil samples in AL-Najaf governorate by using nuclear track detector (CR-39). Baghdad Sci.J [Internet]. 2015 Sep. 6 [cited 2024 Nov. 23];12(3):603-10. Available from: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/2106