1. Chemometrics in Analytical Spectroscopy;Adams,1995
2. Audouin, J-C., 1997, Geophysical study of acid rock drainage in the City Deep area, Johannesburg, Gauteng. Unpublished MSc Thesis, University of the Witwatersrand, Johannesburg, South Africa, 112pp.
3. Einax, J.W., Zwanziger, H.W., Greiß, S., 1997. Chemistry in Environmental Analysis. Wiley.
4. Environmental Soil and Water Chemistry. Principles and Applications;Evangelou,1998
5. Mineralogy of the Witwatersrand Reef;Feather;Mineral Science and Engineering,1975