PENGEMBANGAN E-LKPD BERBASIS PROBLEM BASED LEARNING MATERI TUMBUHAN SUMBER KEHIDUPAN DI BUMI PADA PEMBELAJARAN IPAS KELAS IV SEKOLAH DASASR. widyajaya [Internet]. 2025 Sep. 30 [cited 2026 May 14];5(2):298-311. Available from: https://journal.mpukuturan.ac.id/index.php/widyajaya/article/view/1355