Exploration of the Keteng-Keteng Musical Instrument in Learning the Surface Area of Cylinders at SMPS Deli Murni Bandar Baru. JIME [Internet]. 2025 Aug. 1 [cited 2026 Jun. 30];11(3):581-7. Available from: https://ejournal.mandalanursa.org/index.php/JIME/article/view/9096