TitleSouth Pacific Ocean Bismarck Archipelago:Ninigo GroupContributorAllied Geographical SectionDescriptionVariation for 1922 and applicable for 1932. From the chart produced by the German Admiralty. Reproduced by the Hydrographic Branch, Dept. of the Navy, Sydney 1942LanguageGermanEnglish
Allied Geographical Section South West Pacific Area Terrain Studies (1943). Monash Uni, accessed 14/03/2026, https://collections.monash.edu/nodes/view/78332
