Sources of information U.S. Coast and Geodetic Survey, U.S. Army Engineers, Bureau of Public Works, Bureau of Lands, Bureau of Foresty and other Philippine Government Bureaus, provincial and municipal officials; Bureau Coast and Geodetic Survey…
30th August 1944. Based on AMS S401 First edition NC51-3. Additional information by Allied Geographical Section; Boundaries indicate areas dealt with in the text Ref Sec VII