Cobban, D.A. and Silberbauer, M.J., 1993. Water quality decision-making facilitated through the development of an interface between a geographic information system and a water quality database. In: S.A. Lorenz, S.W. Kienzle, and M.C. Dent, eds. Hydrology in Developing Regions... the Road Ahead. Proceedings of the Sixth South African National Hydrological Symposium. Pietermaritzburg, South Africa: Department of Agricultural Engineering, University of Natal, 523-530.
Cobban, D., 1994. Assessment of water quality through a menu-driven user interface on a geographic information system platform. In: Computer Graphics '94, 6-9 September.Go to http://www.dwaf.gov.za/iwqs/wq_guide/index.html for the most up-to-date guidelines.
Department of Water and Sanitation (DWAF) 1993. Volume 1. Recommended guidelines for domestic water use. Department of Water and Sanitation, Private Bag X313, Pretoria, South Africa 0001.
Department of Water and Sanitation (DWAF) 1993. Volume 2. Recommended guidelines for recreational water use. Department of Water and Sanitation, Private Bag X313, Pretoria, South Africa 0001.
Department of Water and Sanitation (DWAF) 1993. Volume 3. Recommended guidelines for industrial water use. Department of Water and Sanitation, Private Bag X313, Pretoria, South Africa 0001.
Department of Water and Sanitation (DWAF) 1993. Volume 4. Recommended guidelines for agricultural water use. Department of Water and Sanitation, Private Bag X313, Pretoria, South Africa 0001.
Maucha, R. (1932) Hydrochemische Metoden in der Limnologie (Hydrochemical methods for Limnology). Binnengewässer 12, 1-173.
Broch, E.S. & W. Yake (1969) A modification of Maucha's ionic diagram to include ionic concentrations. Limnology and Oceanography 14, 933-935.
Silberbauer, M.J. & J.M. King (1991) Geographical trends in the water chemistry of wetlands in the south-western Cape Province, South Africa. Southern African Journal of Aquatic Sciences 17 (1/2), 82-88.
Jonck, F., W. Wolfer & R. Potgieter (1995) Presentation standards for GIS users. Department of Water and Sanitation, Private Bag X313, Pretoria, South Africa 0001.
Silberbauer, M.J. (1996) DWAF presentation standards for GIS use, adapted for the Institute for Water Quality Studies. IWQS, Department of Water and Sanitation, Private Bag X313, Pretoria, South Africa 0001. N/0000/00/000/0596. http://www.dwaf.gov.za/iwqs/mapguide/mapguide.htm
Tueteberg, B.H. (1995) Symbols and abbreviations used on South African charts. Hydrography, South African Navy Hydrographical Office publication HO-6.