DEVELOPMENT OF NON-WOVEN FILTER FOR 3 LAYER MASK FROM BAMBOO/POLYPROPYLENE FIBERS. Int. Res. J. Pharm. [Internet]. 2021 May 14 [cited 2026 Oct. 26];12(5):21-4. Available from: https://irjponline.org/index.php/irjp/article/view/3083