AHMED, Firas Hashem; KARIM, Mahmood Salim; DARWOYSH, Hassan Hadi; MANSOUR, Hazim Louis. Determination of Natural Radioactivity in Some Commercial Motor Oil Samples. Al-Nahrain Journal of Science, [S. l.], n. 2, p. 43–47, 2019. Disponível em: https://mail.anjs.edu.iq/index.php/anjs/article/view/2049. Acesso em: 22 may. 2026.