Heavy metal content in organs of the African sharptooth catfish, Clarias gariepinus (Burchell), from a Transvaal lake affected by mine and industrial effluents. Part 1. Zinc and copper
Programme for Atmospheric Water Supply (1987-1989). Final report Volume 2: Aircraft and radar measurements and cloud seeding experiments
Programme for Atmospheric Water Supply (1987-1989). Final Report Volume 3: Radar data interpretation, cloud modelling and statistical considerations
Detailed geographical investigations in the Poesjesnels River catchment in the Breede river valley with special reference to mineralisation