DEVELOPMENT OF NON-WOVEN FILTER FOR 3 LAYER MASK FROM BAMBOO/POLYPROPYLENE FIBERS . International Research Journal of Pharmacy, [S. l.], v. 12, n. 4, p. 21–24, 2021. Disponível em: https://irjponline.org/index.php/irjp/article/view/147. Acesso em: 30 may. 2026.