Reconsideration of the so-called Oligocene fauna in the asphaltic deposits of Buton (Malay Archipelago). 2. YoungNeogene Foraminifera and calcareous algae.
1953. Reprint Leidse Geol. meded. XVII; pp. 259-293, 4 plts. Orig. wrps. with libr. stamp, good.