VERSTELLE, J. Th. The need for Coordination of geographical Grids of the World, in relation to Position-fixing by Radionavigation Systems. The International Hydrographic Review, [S. l.], n. 1, 2018. Disponível em: https://journals.lib.unb.ca/index.php/ihr/article/view/26888. Acesso em: 1 jun. 2024.