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Kadsri K, Cheausuwantavee C, Yamrung R. A STUDY OF MATHEMATICAL PROBLEM SOLVING ABILITY AND MATHEMATICALREASONING ABILITY OF NINTH GRADE STUDENTS IN SURFACE AREAS AND VOLUMES USING COGNITIVE GUIDED INSTRUCTION WITH VISUALIZATION AND THE CONVENTIONAL METHOD. JMND [internet]. 2022 Aug. 31 [cited 2026 Sep. 10];9(8):92-107. available from: https://so03.tci-thaijo.org/index.php/JMND/article/view/263272