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Ahmadiah N, Amin BD, Sari SS. Development of Problem Based Learning Oriented Student Worksheets in Improving Students’ Critical Thinking Skills. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2023 Feb. 28 [cited 2024 Mar. 29];9(2):959-64. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/2828