Supakdee, Kanokwan, Pattra Suansokchuak, Kiatisak Pranet, and Thachada Khotmongkol. “A Development of Model for School Milk’s Transportation Vehicles in Ubon Ratchathani and Sisaket Provinces”. Thai Industrial Engineering Network Journal 5, no. 1 (June 26, 2019): 59–65. Accessed September 26, 2022. https://ph02.tci-thaijo.org/index.php/ienj/article/view/188618.