DINIYAH, E. N.; WIRYANTO, W.; EKAWATI, R.; HENDRATNO, H. Development of scale learning tools on map based on problems to improve problem solving skills. Jurnal Math Educator Nusantara: Wahana Publikasi Karya Tulis Ilmiah di Bidang Pendidikan Matematika, v. 7, n. 2, p. 121-134, 20 Nov. 2021.