2 August 1944. Information from informants as at 1941 and map 7(a) S.R.D static report. Shows boundary of swamp area, trackes, metalled roads, Japanese Airfield, rubber estates.
14 April 1944. From maps of the Sarawak Oilfields Limited Survey Dept dated [blank], corrected to 12.3.41, with annotations from informants, formerly resident.
16th December 1943. Based on standard traverse by A R Miller LS, MIS, 1938-30. Topographical information from 0 km to 32 km from field notes and from 32 km to Maprik from air photography by Australasian petroleum Co.
18th September 1944. Coast and Geodetic Survey Manila, P.I. 1940 ; Sources of information US Coast and Geodetic Survey, U.S Army Engineers, Bureau of Public Works ; Bureau of Lands, Bureau of Forestry and other, Philippine Government Bureaus and…