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Rankin, Daniel J. (1901). Prospecting for Gold; a Handbook of Practical information and Hints for Prospectors Based on Personal Experience. London:. Crosby Lockwood.
Berkman, D.A. and Ryall, W.R. (eds) (1982). Field Geologists’ Manual. Victoria: Australasian Institute of Mining and Metallurgy,301pp, 2nd edition. Hardback,. Australasian IMM.
Viljoen, M.J. and Reimold, W.U. (1999). An Introduction to South Africa’s Geological and Mining Heritage. Mintek.