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.