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Aprilia D, Praja ES, Noto MS. Desain Bahan Ajar Lingkaran Berbasis Koneksi Matematis Siswa SMP. Union J. Ilm. Pendidik. Mat. [Internet]. 2018 Feb. 13 [cited 2024 May 30];6(1). Available from: https://jurnal.ustjogja.ac.id/index.php/union/article/view/1547