Rupasinghe, Vini 8 විද්යාව - Agasara Publisher Nugegoda 2017 - 136p 1 - 2024-01-11 ISBN: 978-955-7949-92-5 Nat. Bib. No.: 0005209 Nat. Bib. Agency Control No.: RUP Universal Decimal Class. No.: 500