Determination of manganese, iron, calcium and potassium in soil samples . Al-Mukhtar Journal of Basic Sciences, [S. l.], v. 18, n. 1, p. 63–83, 2026. DOI: 10.54172/z09f6j38. Disponível em: https://mdp.omu.edu.ly/journals/index.php/mjbs/article/view/2221. Acesso em: 3 jul. 2026.