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Susantri A, Husna N, Buyung B. Students’ Mathematic Problem Solving Ability with Problem Solving Learning Model in Class VII SMP Negeri 2 Singkawang. jg [Internet]. 2022Dec.28 [cited 2024Dec.19];7(2):163-72. Available from: https://ojs.umrah.ac.id/index.php/gantang/article/view/4963