HERATH, M.M.J.W. Economic geology of Sri Lanka / [by] M.M.J.W.Herath - 5th ed. - Maharagama Ministry of Industrial Development 1995 - xi, 217 p. Includes references. ISBN: 9559319000 Subjects--Topical Terms: Economic geology-Sri Lanka Dewey Class. No.: 910.11 / HER