Rinwong, Namfon, Thanamonthachanok Prompinij, Achara Jinvong, Sungkom Suparatanagool, Kasama Kongprasert, and Patcharaporn Chaisri. 2023. “Emergency Medical Service: A Case Study of the Local Government Administration Ban Tad Subdistrict, Mueang District, Udon Thani Province”. Journal of Health Systems Research 17 (4). Nonthaburi, Thailand:699-715. https://he04.tci-thaijo.org/index.php/j_hsr/article/view/2422.