Proceedings of an International Seminar on Laterite, October 14-17, 1985, Tokyo, Japan : a Collection of 2 Plenary Lectures and 37 Selected Papers Together with the Discussions Presented at the Geoscientific Sessions of the Third International Seminar on Laterite which was Organized by the Japan National Committee for International Geological Correlation Programme (I.G.C.P.), the Mining and Metallurgical Institute of Japan (M.M.I.J.) and the International Working Group of the I.G.C.P Project Proposal and Held in Tokyo, Japan, on October 14-17, 1985