Hamzah N, Abd Aziz NA. Evaluation of Water Quality Index (WQI) in the Estuary of Sungai Ayam, Batu Pahat, Johor. rtcebe [Internet]. 2024 Sep. 24 [cited 2026 Aug. 15];5(1):188-97. Available from: https://periodical.uthm.edu.my/index.php/rtcebe/article/view/7968