STUDY TO ESTABLISH THE PRESENCE AND QUANTIFICATION OF THE ELEMENTS AT VARIOUS RANGES. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 4, n. 12, p. 627–639, 2017. Disponível em: https://ijaerd.org/index.php/IJAERD/article/view/5150. Acesso em: 7 mar. 2026.