Title: Rāingān chabap sombūn khrōngkān sưksā phon krathop thāngdān sētthasāt čhāk kānchai namman baiʻōdīsēn
Description: Complete report of studies on the economic effect from using biodiesel oil, case study of biodiesel production and biodiesel usage by hire pick-up trucks in Chiang Mai Province, Northern Thailand.