Pelendhagee, Lakshman භෞතික රසායනය ඉලක්ක රචනා - S.Godage Publisher Colombo 2018 - 184p 1 - 2024-01-19 ISBN: 978-955-30-8946-5 Nat. Bib. No.: 0006861 Nat. Bib. Agency Control No.: PEL Universal Decimal Class. No.: 540