1956 (Published 1958) Including: The geology of the Dikgomo di kae area, by D. J. Cullen. The geology of the Gaberones district, by E. P. Wright.

1956 (Published 1958) Including:
The geology of the Dikgomo di kae area, by D. J. Cullen. The geology of the Gaberones district, by E. P. Wright.
A reconnaissance report on the salt deposits of the Nata River delta, by O. J. van Straaten.
The geology of the area South of Lake Ngami, by E. P. Wright.