ЛУВСАН, О. The DETERMINATION OF THE MANGANESE (MN) CONTENT IN BLACK TEA USING NEUTRON ACTIVATION ANALYSIS. Scientific transaction of the National University of Mongolia. Physics, [S. l.], v. 38, n. 621, p. 72–76, 2025. DOI: 10.22353/physics.v38i621.10080. Disponível em: https://journal.num.edu.mn/physics/article/view/10080. Acesso em: 5 dec. 2025.