Lizah, Rifaam, Slamet Asari, & Iqnatia Alfiansyah. " Development Of Teaching Materials In Mathematics Lessons In Semester Ii In Class IV Students Of Elementary School." Journal Universitas Muhammadiyah Gresik Engineering, Social Science, and Health International Conference (UMGESHIC) [Online], 1.2 (2021): 233-238. Web. 21 Nov. 2024