Pokpermdee, Pongsadhorn, Wimolwan Suktonaeng, and Jaruwan Sumalu. “Size Categorization of Health Centers in Surin, 2007”. Journal of Health Science of Thailand 19, no. 6 (January 11, 2018): 865–877. Accessed December 5, 2025. https://thaidj.org/index.php/JHS/article/view/1545.