Yahya Raham, Ahmad, and Hadi D. AL-attabi. “Study and Calculation of the Specific Natural Radioactivity of Samples of Portland Cement in Iraq Using a High-Purity Germanium Detector”. Nexo Scientific Journal 36, no. 06 (December 31, 2023): 1141–1149. Accessed November 21, 2024. https://camjol.info/index.php/NEXO/article/view/17470.