1. Adelaar, T.F., 1974, Veeartsnykunde Onderstepoort (Reuter and Gouws, 1974).
2. Borehole Water Association of Southern Africa, 1990, Groundwater—Guidelines for Boreholes. Compiled by Borehole Water Association of Southern Africa, CSIR (Ematek), Department of Agricultural Development, Department of Water Affairs and the Geological Society of South Africa. CSIR (Ematek), Pretoria. 3–27.
3. Casey, N.H., Meyer, J.A., and Coetzee, C.B., 1998, An investigation into the quality of water for livestock production with the emphasis on subterranean water and the development of a water quality guideline index system. Water Research Commission. Project No K5/644/1/98. ISBN No: 1 86845 739 0. Vol. 1:1–37.
4. DWA&F, 1991, Department of Water Affairs and Forestry, Water Quality Management policies and strategies in the RSA. Pretoria.
5. DWA&F, 1993, Department of Water Affairs and Forestry, South African Water Quality Guidelines (1st edn.) Agricultural Use: Livestock Watering. 67–134.