Hashim, M., Ismail, W. R., Che Ngah, M. S. Y., Nayan, N., Saleh, Y., & Said, Z. M. (2011). Trend Luahan Tahunan di LembanganSungai Perak 1915-2006: Sungai Perak’s Catchment Yearly Discharge Trend 1915-2006. Perspektif Jurnal Sains Sosial Dan Kemanusiaan, 3(2), 53–63. Retrieved from https://ejournal.upsi.edu.my/index.php/PERS/article/view/1599