“EVALUATION OF X-RAY RADIATION SHIELDING OF CONCRETE WITH TWO POLYMERIC ADDITIVES”. Journal of Engineering and Sustainable Development 23, no. 6 (November 1, 2019): 101–108. Accessed July 22, 2024. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/185.