Kalsum Abdul Karim, Umi, et al. “Study on Vertical Profile of 210Pb and Sedimentation Rate at Pantai Remis Coastal Area and Kuala Selangor Estuary”. International Journal of Engineering and Technology, vol. 7, no. 3.11, July 2018, pp. 202-5, https://doi.org/10.14419/ijet.v7i3.11.15961.