Pelendhage, Lakshman රසායන විද්යාව බහුවරණ 1000 - S.Godage Publisher Colombo 2017 - 184p 1 - 2024-01-17 ISBN: 978-955-30-8412-5 Nat. Bib. No.: 0007836 Nat. Bib. Agency Control No.: PEL Universal Decimal Class. No.: 540