Dhanapala, Swarnana විද්යාව 6 ශ්රේණීය - Sarasvi Publisher Nugegoda 2016 - 200p 1 - 2023-12-05 ISBN: 978-955-31-0444-1 Nat. Bib. No.: 0004921 Nat. Bib. Agency Control No.: DHA Universal Decimal Class. No.: 500