Yutthana Apichatbutr. (2021) Physiologic and Other Effects of Silicone Mask Respirator N99 in the Coronavirus 2019 Outbreaks. <i>Vajira Medical Journal</i>, <i>65</i>(1), 1-12.Yutthana Apichatbutr. "Physiologic and Other Effects of Silicone Mask Respirator N99 in the Coronavirus 2019 Outbreaks". Vajira Medical Journal 65 (2021):1-12.Yutthana Apichatbutr. Physiologic and Other Effects of Silicone Mask Respirator N99 in the Coronavirus 2019 Outbreaks. Text and Journal Publication:ม.ป.ท. 2021.