,. Echo Sounding devices presented by the Marconi Sounding Device Company during the IVth International Hydrographic Conference Monaco, 1937 — Marconi Echometer, types 421, 424, 429, 430, Marconi Magneto Striction Equipment, with recorder. The International Hydrographic Review, [S. l.], n. 2, 2018. Disponível em: https://journals.lib.unb.ca/index.php/ihr/article/view/27634. Acesso em: 2 jun. 2024.