H. N. Hamidon, S. A. Mohd Najib, and S. Aliah, “Water Quality of Selected Rivers in Behrang River Catchment, Perak Malaysia: Kualiti Air Sungai terpilih di Lembangan Sungai Behrang, Perak Malaysia”, GEOG, vol. 9, no. 2, pp. 107–118, Dec. 2021.