Nasution ANS, Irawan B, Rambe IH. Development of Ethnomathematical-Based Student Worksheets for Gordang Sambilan Musical Instruments on Cone Slice Material for Class XI SMA Primbana Medan. J. of Maths Tech and Edu [Internet]. 2021Dec.31 [cited 2024May19];1(1):19-2. Available from: https://talenta.usu.ac.id/jomte/article/view/7577