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พูลสวัสดิ์ พ. THE DEVELOPMENT OF TEACHING MODEL TO ENHANCE THE PROBLEM SOLVING CAPABILITY IN MATHEMATIC FOR FIFTH GRADE STUDENTS. J. IND. EDUC. [Internet]. 2016 Aug. 31 [cited 2024 May 2];15(2):72-9. Available from: https://ph01.tci-thaijo.org/index.php/JIE/article/view/122424