TitleSapu Bay: Philippine Islands south coast of MindanaoContributorAllied Geographical SectionDescriptionSurveyed in 1923 Soundings in Fathoms at mean lower low water 01:10.0LanguageEnglish
Allied Geographical Section: WWII South West Pacific Area Special Reports (1944). Monash Uni, accessed 15/02/2026, https://collections.monash.edu/nodes/view/99225