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Nixon, Peter H. , ed. (1973). Lesotho Kimberlites. Lesotho National Development Corporation. 350pp. + fold out map, ‘Kimberlite and Dolerite Intrusions. Lesotho Gov't..
Viljoen, M.J. and Reimold, W.U. (1999). An Introduction to South Africa’s Geological and Mining Heritage. Mintek.