Basnayaka, Hemachnadra කාබනික රසායනය - S.Godage Publisher Colombo 2013 - 284p 1 - 2024-01-11 ISBN: 978-955-30-4656-4 Nat. Bib. No.: 0006081 Nat. Bib. Agency Control No.: BAS Universal Decimal Class. No.: 530