1. Allen R.E., (ed.), 1992:Concise Oxford Dictionary, Clarendon Press, Oxford.
2. Amis J., Duthe-Taussig D., Morton K. and Sibilski U.,2001:A strategic plan for the efficient monitoring of trends in ground water quality affected by gold mining in South Africa. Conference on environmentally responsible mining in southern Africa, 25?28 September 2001, Muldersdrift, Johannesburg. Papers, Vol.1, 4A?1?4A-5.
3. Bain C.A.R., Schoonbee H.J., de Wet L.P.D. and Hancke J.J.,1994: Investigations into the concentration ratios of selected radionuclides in aquatic ecosystems affected by mine drainage effluents with reference to the study of potential pathways to man. WRC report No.313/1/94. Pretoria.
4. Botha J.C. and Human C.F.,2001:The radiological impact of radon and dust, from gold mining operations, on the public. Conference on environmentally responsible mining in southern Africa, 25?28 September 2001, Muldersdrift, Johannesburg. Papers, Vol.1, 2C11?2C18.
5. BUNR (Bundesminister fur Umwelt, Naturschutz und Reaktorsicher-heit), 1988:Radionuklide in Wasser-Schwebstoff-Sediment-Systemen und Abschatzung der Strahlenexpositionff Fischer Verlag, Stuttgart, New York. 300S.