Saensri, Supapon, Krongkarn Phaiphukhiao, Surapong Yatsomboon, Phornpimon Iamsaard, and Panida Charernyuth. 2023. “A study of Performance According to Occupational Health and Environmental Medicine Service Standard in the hospital, Health Region 9, 2021-2022”. Journal of the Office of Disease Prevention and Control 9 Nakhon Ratchasima 29 (3):35-49. https://he02.tci-thaijo.org/index.php/ODPC9/article/view/260152.