1929-1931 (6th ed.) Bevattende het Westelijk Gedeelte / Midden Gedeelte van den Oost-Indischen Archipel. xiv, 469 & xvi, 599 p., num. figs, 3 folded maps, cloth (somewhat rubbed, not very tight, upper end spine vol. I loose). Including the separate issued ''Aanvullingsblad no. 3, 1933 op deel I" and "Aanvullingsblad No. 1, 1933 op deel II"East Indies (Indonesia) pilot published by the hydrographical department of the dutch Ministry of Defence. A third volume covering the eastern part of Indonesia was also published. Scarce manuals and still useful.