phuangburee, theerawat, and Chatchai Traiyarat. 2022. “Google Application for Refer System in Na Kae Hospital Na Kae District, Nakhon Phanom Province”. Royal Thai Air Force Medical Gazette 68 (1):34-39. https://he02.tci-thaijo.org/index.php/rtafmg/article/view/255930.