1. L.A.D. Chin, “Research Directions to Increase Alumina Recovery From Bauxites”, Proc. Bauxite Symposium, 1984, MME, New York, pp. 641–650.
2. I. Valeton, Developments in Soil Science:I, Bauxite, 1972, Elsevier, New York.
3. G.S. Brady and H.R. Clauser, Materials Handbok, 1991, 13th Ed., McGraw-Hill, New York.