Fagerholm, P. O., and A. Thunberg. “Electronic Positioning in Swedish Coastal Hydrographic Surveys: (A Report on Operational Trials Primarily With the Hydrodist MRB 2 in 1961–62)”. The International Hydrographic Review 3 (March 22, 2018). Accessed December 21, 2024. https://journals.lib.unb.ca/index.php/ihr/article/view/26376.