Yamin Y, Napitupulu EE, Harahap F. DEVELOPMENT OF MATHEMATICAL LKPD BASED ON SCIENTIFIC APPROACH TO IMPROVE STUDENTS' MATHEMATICAL PROBLEM SOLVING AT SD NEGERI 1 RIMO . SIJEL [Internet]. 2022Feb.5 [cited 2026Aug.16];2(1):165-87. Available from: https://www.sijel-journal.sensei-journal.com/jbo/article/view/76