Chamnan E- angkul. ACADEMIC MANAGEMENT GUIDELINES FOR IMPROVING ACADEMIC ACHIEVEMENT OF HIGHLAND SCHOOL STUDENTS, PHITSANULOK PRIMARY EDUCATIONAL SERVICE AREA OFFICE 3. JMND [internet]. 2021 Jul. 31 [cited 2026 Sep. 28];8(8):90-104. available from: https://so03.tci-thaijo.org/index.php/JMND/article/view/254270