Fitrianingrum F. DEVELOPMENT OF CONTEXTUAL-BASED MATHEMATICS STUDENT ACTIVITY SHEETS (LKS) AT SMP N 11 YOGYAKARTA. GEOM APLL MATH [Internet]. 2023 Jul. 30 [cited 2025 Oct. 3];1(2):54-9. Available from: http://tesseract.nindikayla.com/index.php/home/article/view/11