October 1944. Drawn and reproduced from printed copy of North Borneo G.S.G.S. no. 4311 (dated 1941) by L.H.Q. Cartographic Coy., Aust. Survey Corps, Oct 44.
Allied Geographical Section, “The state of North Borneo 1941: East sheet first edition,” Monash Collections Online, accessed February 5, 2023, https://repository.monash.edu/items/show/28698.