Abeydeera,Nilmini ගණිතය-1 11 ශ්රේණිය - Samudra Book Publishers Colombo 08 - 231 1 - 2023-12-01 ISBN: 978-955-680-513-0 Nat. Bib. No.: 0004752 Nat. Bib. Agency Control No.: ABE Universal Decimal Class. No.: 510