Phetliap , Witchaya, and Valanchaya Khetbumrung. 2022. “Factors Related to the Use of Personal Protective Equipment among the farmers aged over 50 years in Pudsa Sub-district, Mueang District, Nakhon Ratchasima Province”. Journal of the Office of Disease Prevention and Control 9 Nakhon Ratchasima 28 (1):16-26. https://he02.tci-thaijo.org/index.php/ODPC9/article/view/255883.