Hamad, Hadeel Tariq, Nada Farhan Kadhim, and Mahmood Salim Karim. “Radon Gas Questionnaire for Students of the College of Science, Mustansiriyah University”. Al-Mustansiriyah Journal of Science 32, no. 4 (November 20, 2021): 72–75. Accessed March 26, 2023. https://mjs.uomustansiriyah.edu.iq/index.php/MJS/article/view/1014.