KADHIM EKAL, Ali. Investigation of natural radioactivity in the soil of Kufa zone , Najaf governorate, Iraq. Journal of Kufa-Physics, Kufa, Najaf, IRAQ, v. 5, n. 2, 2013. Disponível em: https://journal.uokufa.edu.iq/index.php/jkp/article/view/7493. Acesso em: 7 aug. 2026.