Zickwolff, G. “The Advantages of Stereographic Projection: Charts 2812 and 2813 of the ‘Deutsches Hydrographisches Institut’ (DHI)”. The International Hydrographic Review 59, no. 1 (July 13, 2015). Accessed September 27, 2024. https://journals.lib.unb.ca/index.php/ihr/article/view/23565.