TitlePhilippine Islands, South coast of Catanduanes:Cabugao BayContributorAllied Geographical SectionDescriptionSurveyed in 1921; From USC & GS chart 4269LanguageEnglish
Allied Geographical Section South West Pacific Area Terrain Studies (1944). Monash Uni, accessed 14/03/2026, https://collections.monash.edu/nodes/view/77792