D. KHARRUFA, H. Determination of the Concentration of 40K of Mudstone in Northern Iraq by Using Gamma Ray Spectroscopy and Flame Photometry Technique. Rafidain Journal of Science, [S. l.], v. 24, n. 5, p. 97–107, 2013. DOI: 10.33899/rjs.2013.88674. Disponível em: https://edusj.uomosul.edu.iq/index.php/rsci/article/view/47209. Acesso em: 10 sep. 2025.