Hashim, Mohmadisa, Wan Ruslan Ismail, Mohamad Suhaily Yusri Che Ngah, Nasir Nayan, Yazid Saleh, and Zahid Mat Said. “Trend Luahan Tahunan Di LembanganSungai Perak 1915-2006: Sungai Perak’s Catchment Yearly Discharge Trend 1915-2006”. Perspektif Jurnal Sains Sosial dan Kemanusiaan 3, no. 2 (November 14, 2011): 53–63. Accessed November 22, 2024. https://ojs.upsi.edu.my/index.php/PERS/article/view/1599.