Yohanes, Rudi Santoso, and Ana Easti Rahayu Maya Sari. 2021. “PEMECAHAN MASALAH KOMPETISI MATEMATIKA BAGI GURU SEKOLAH DASAR TAHAP I”. Share: Journal of Service Learning 7 (2):99-104. https://doi.org/10.9744/share.7.2.99-104.