Ehlers, Peter. «Marine Geospatial Information and Hydrographic Services Keynote Address at the CARIS 2004 Conference ’Where Waterways Meet’». The International Hydrographic Review 6, no. 1 (enero 1, 2005). Accedido mayo 19, 2024. https://journals.lib.unb.ca/index.php/ihr/article/view/20692.