Gunasekara, Sman Pushpa විශ්ව දැනුම - S.Godage Publisher Colombo 2015 - 255p 1 - 2023-11-29 ISBN: 978-955-30-5738-9 Nat. Bib. No.: 0004233 Nat. Bib. Agency Control No.: GUN Universal Decimal Class. No.: 001