MALMQUIST, Lars. Distance Keeping and Frequency Synchronization in Swedish Hydrographic Surveying (Parallel Sounding) — 1972. The International Hydrographic Review, [S. l.], v. 50, n. 1, 2015. Disponível em: https://journals.lib.unb.ca/index.php/ihr/article/view/23838. Acesso em: 21 may. 2024.