, The Marconi International Marine Communi. Echo Sounding Apparatus : New Marconi "Graphette" Dry-Paper Recording Echometer. The International Hydrographic Review, [S. l.], n. 1, 2018. Disponível em: https://journals.lib.unb.ca/index.php/ihr/article/view/26769. Acesso em: 20 nov. 2024.