Kadhim Ekal, Ali. “Investigation of Natural Radioactivity in the Soil of Kufa Zone , Najaf Governorate, Iraq”. Journal of Kufa-Physics 5, no. 2 (December 10, 2013). Accessed May 18, 2024. https://journal.uokufa.edu.iq/index.php/jkp/article/view/7493.