Herath, J.W. Mineral resources of Sri Lanka - Geological Survey Department Colombo 1980 - 70p. - Minerals Sri Lanka - Economic bulletin No.2 . Nat. Bib. No.: 3724 Nat. Bib. Agency Control No.: 553(548.7)HER Subjects--Topical Terms: Earth Sciences Universal Decimal Class. No.: 553(548.7) 1