K. Ahmed , Israa, Mahdi Hadi Jasim, and Shafik S. Shafik. 2022. “Measurement of Radon Concentration in Fly Ash Samples from Electric Power Stations in Iraq in The Middle & South by Using Nuclear Track Detector CR-39”. Iraqi Journal of Science 57 (2C): 1402-7. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/7126.