1957/1958 (Published 1961) Including: The Shushong series and associated intrusives, by D. J. Cullen.

1957/1958 (Published 1961) Including:
The Shushong series and associated intrusives, by D. J. Cullen.
A note on the development of potable water supplies at depth in the central Kalahari, by C.Boocock & O. J. van Straaten.
Progress in coal exploration - The Mamabule coalfield area, by D.Green.
A note on the chemical composition of some ground waters from the Bechuanaland Protectorate, by O.J.van Straaten.