Muhammad, A. A., Salim, A., & Marasabessy, F. (2017). The Application of Acoustic Material Egg Tray as Noise Absorbers in the Interior of Elementary School Classroom. MITRA: Jurnal Pemberdayaan Masyarakat, 1(1), 18–31. https://doi.org/10.25170/mitra.v1i1.11