“Radioactivity of Some Soils in the University of Tikrit, Iraq, College of Education for Girls Using Solid-State Nuclear Track Detector Type CR-39”. Iraqi Journal of Science 60, no. 9 (September 29, 2019): 2015–2021. Accessed December 21, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/924.