THE STUDY OF THE MINERAL CHEMICAL COMPOSITION OF THE YAKUT SAPONITE MINERAL AND THE PHYSICO-CHEMICAL BASES OF COMPLEX TRACE ELEMENTS. American Journal of Pedagogical and Educational Research, [S. l.], v. 7, p. 63–70, 2022. Disponível em: https://americanjournal.org/index.php/ajper/article/view/243. Acesso em: 3 feb. 2026.