TitlePhilippine Islands, East coast of Luzon:San Miguel BayContributorAllied Geographical Section Department of Commerce, United States of AmericaDescriptionContains the inset map Bicol River from mouth to Naga From US C & GS chart no. 4223; Authorities: surveys to 1921. Bicol River from survey by Bureau of Navigation in 1911LanguageEnglish
Allied Geographical Section South West Pacific Area Terrain Studies (1944). Monash Uni, accessed 14/04/2026, https://collections.monash.edu/nodes/view/77799
