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Sitinjak RM, Simanjuntak E. THE IMPLEMENTATION OF PROBLEM BASED LEARNING MODEL TO INCREASE STUDENTS™ MATHEMATICAL PROBLEM SOLVING FOR GRADE VIII AT SMP NEGERI 37 MEDAN 2019/2020. JH [Internet]. 2019 Dec. 20 [cited 2025 Jan. 31];10(2):90-8. Available from: http://103.242.233.34/index.php/handayani/article/view/16054