Mahmud, M. R., N. Hewitt, G. Johnston, S. Ironside, and A. H. Omar. 2020. “FIG Commission 4 – Hydrography Work Plan (2019-2022) and Commission Activities”. The International Hydrographic Review, no. 24 (November):209-13. https://journals.lib.unb.ca/index.php/ihr/article/view/33160.