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Pengembangan Busy Book Berbasis Loose Parts Untuk Melatih Problem Solving Anak Usia Dini. J. Instr. Dev. Res. [Internet]. 2023 Aug. 31 [cited 2026 Oct. 29];3(4):178-87. Available from: https://www.journal.iel-education.org/index.php/JIDeR/article/view/242