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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 2022 Oct. 2];8(8):90-104. Available from: https://so03.tci-thaijo.org/index.php/JMND/article/view/254270