ยมรัตน์ เ. THE DEVELOPMENT OF STUDENT ASSISTANT SYSTEM: A CASE STUDY OF BANNONGJAN SCHOOL, KHAM SAKAESAENG DISTRICT, NAKHON RATCHASIMA PROVINCE. Ph.D. in Soc. Sci. J. [internet]. 2018 Aug. 31 [cited 2026 Aug. 30];8(2):101-15. available from: https://so05.tci-thaijo.org/index.php/phdssj/article/view/92216