Studies on health aspects of water reclamation during 1974 to 1983 in Windhoek, South West Africa/ Namibia
Epidemiological studies pertaining to the possible reclamation and reuse of purified sewage effluent in the Cape Peninsula
Die invloed van sekere grondfisiese veranderlikes op infiltrasievermoe in die Ntuze-opvanggebied (Zoeloelandse kusstrook)
Technical note: Control of Xenopus laevis (Amphibia: Pipidae) in fish ponds with observations on its threat to fish fry and fingerlings