SIRIRATPAIBOOL, W. Guidelines for estimating an appropriate wastewater treatment system: A case study of Health Region 8, Udon Thani Province. Journal of Health Promotion and Environmental Health Research Health Promotion Centre 8 Udon Thani, Udon Thani,Thailand, v. 3, n. 3, p. 48–67, 2025. Disponível em: https://he04.tci-thaijo.org/index.php/hpc8Journal/article/view/3589. Acesso em: 7 oct. 2025.