References
Leonard, J., ,1984- “proceeding of 1984 bauxite symposium”, published by SME Los angles, California PP: 656 -661
Meyer, F. M, 2004- "Availability of bauxite reserves", Natural Resources Research, Vol. 13, no. 3, pp. 161-172
Rayzman, V. L., 2003- “Extracting Silica and Alumina from low grade bauxite”, JOM pp: 47-50
www.lme.co.uk/dataprices_pricegraphs.asp, 5 January,2006