Hamidon, H. N., Mohd Najib, S. A. and Aliah, S. (2021) “Water Quality of Selected Rivers in Behrang River Catchment, Perak Malaysia: Kualiti Air Sungai terpilih di Lembangan Sungai Behrang, Perak Malaysia”, GEOGRAFI, 9(2), pp. 107–118. doi: 10.37134/geografi.vol9.2.6.2021.