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TAMPUBOLON, K. (2019) “UPAYA MENINGKATKAN HASIL BELAJAR SISWA DENGAN MENGGUNAKAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING PADA PADA MATA PELAJARAN MATEMATIKA KELAS IV SDN 106788 PURWODADI KECAMATAN SUNGGAL KABUPATEN DELI SERDANG TAHUN PEMBELAJARAN 2018/2019”, Jurnal Ilmiah Aquinas, 2(2), pp. 272–289. doi: 10.54367/aquinas.v2i2.553.