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…
5th October 1944. Map showing hydro, steam, diesel plants. Based on USC & GS Manila 1941 sheet 100. Additional information by Allied Geographical Section,USC & GS Manila 1941 sheet 100. Additional information by Allied Geographical Section, 5 Oct 44.
5th October 1944. Information from US Geological Survey Strategic Engineering study no. 124. Based on USC & GS Manila 1941 sheet 100. Additional information by Allied Geographical Section, 5 Oct. 44.