Cover title. "Mei 1931". Private library of Dr John Sturgus Bastin; #b East Sussex, United Kingdom; #c Direct purchase; #d March 2015;#e(B29032315C) National Library Singapore stamp on pages 1 & 2 (B20343591E) Rare material - handle and store according to library's policy for handling and storing such material. Microfilm copy shelved at: NL28935 (Mededeeling / Het Nederlandsche Java-Instituut; no. 9, 1931) John Bastin Collection (B29032315C) (Catalogue ref: IX/522). In Dutch.