Chai, H. P., N. Lee, J. Grinang, T. Y. Ling, and S. F. Sim. “Assessment of Heavy Metals in Water, Fish and Sediments of the Baleh River, Sarawak, Malaysia”. Borneo Journal of Resource Science and Technology, Vol. 8, no. 1, June 2018, pp. 30-40, doi:10.33736/bjrst.822.2018.