2024. DEVELOPMENT OF POP-UP BOOK MEDIA FOR SPATIAL CONSTRUCTION MATERIALS FOR FOURTH GRADE STUDENTS AT STATE ELEMENTARY SCHOOL 121309 GURILLA PEMATANGSIANTAR. Jurnal Merah Putih Sekolah Dasar. 1, 1 (Jan. 2024), 18–26. DOI:https://doi.org/10.24114/jmpsd.v1i1.56072.