1st June 1944. Terrain study, copy no. 627; Some pages have amendments stuck in - page 4 has been scanned twice to show with/without amendments; Map no. 2 and Map no. 8 are missing; For photographs see volume 2
Allied Geographical Section, “Area study of Mindanao Island: volume 1 text and maps,” Monash Collections Online, accessed October 4, 2023, https://repository.monash.edu/items/show/26344.