Sharma, Neeta M, and Aditya Rakesh Chaudhary. “Evolution of Masks As Public Health Intervention in the Control of Respiratory Outbreaks”. National Journal of Community Medicine 11, no. 03 (March 31, 2020): 138–140. Accessed May 4, 2024. https://www.njcmindia.com/index.php/file/article/view/239.