Kasmawan, I. G. A., Supartha, I. W., Wijaya, I. N., & Giriantari, I. A. D. (2018). Utilization of Bali traditional acoustic tools as physical repellent of bird pest on rice paddy crop. International Journal of Physical Sciences and Engineering, 2(3), 51–61. https://doi.org/10.29332/ijpse.v2n3.188