Elsa Despriana, and Astri Wahyuni. “DEVELOPMENT OF MATHEMATICAL LEARNING DEVICES BASED ON CONTEXTUAL LEARNING ON THE MAIN MATERIAL OF THE SET”. Mathematics Research and Education Journal 4, no. 2 (October 30, 2020): 1–7. Accessed July 21, 2026. https://journal.uir.ac.id/index.php/JPM/article/view/9285.