2021. ANALYZING STUDENTS’ UNDERSTANDING OF MATHEMATICAL CONCEPT ABOUT TWO-DIMENSIONAL FIGURES AT GRADE III OF ELEMENTARY SCHOOLS IN SERANG. Primary: Jurnal Pendidikan Guru Sekolah Dasar. 10, 5 (Oct. 2021), 1142–1151. DOI:https://doi.org/10.33578/jpfkip.v10i5.8417.