Perbowo, K.S., Lestari, D., Ulfah, S. and Rakhmawati, R. 2021. MARGINAL REGIONS MATHEMATICS TEACHERS’ PERCEPTION OF THE USE OF MANIPULATIVE TOOLS. Kalamatika: Jurnal Pendidikan Matematika. 6, 2 (Nov. 2021), 143-156. DOI:https://doi.org/10.22236/KALAMATIKA.vol6no2.2021pp143-156.