1. Assessing systematic errors in rainfall runoff models;Aitken;J. Hydrol.,1973
2. Flow characteristics of South African rivers;Braune,1981
3. The economic impact of eutrophication in South Africa;Bruwer,1979
4. Impact of eutrophication control measures on South African impoundments;Grobler,1984
5. The combined effect of geology, phosphate sources and runoff on phosphate export from drainage basins;Grobler;Water Res.,1985