Yahya Raham A, D. AL-attabi H. Study and calculation of the specific natural radioactivity of samples of Portland cement in Iraq using a high-purity germanium detector. Nexo Scientific Journal [Internet]. 2023 Dec. 31 [cited 2024 Jul. 17];36(06):1141-9. Available from: https://camjol.info/index.php/NEXO/article/view/17470