Juni Sahfitri, Firmansyah, Dwi Novita Sari. Exploration Ethnomatematics in Musical Instruments Gordang Nine with Theory Geometry Two Dimensions and Three Dimensions. IJERE [Internet]. 2022 Dec. 10 [cited 2024 May 21];1(2):187-92. Available from: https://ejournal.ipinternasional.com/index.php/ijere/article/view/214