Saensri, S., Phaiphukhiao, K., Charernyuth, P. and Kruewan, N. 2022. Situation and Performance Improvement Guidelines for Occupational Health and Environmental Medicine Services Standard Implementation among Sub-District Health Promoting Hospitals . Journal of the Office of Disease Prevention and Control 9 Nakhon Ratchasima. 28, 1 (Jan. 2022), 70–80.