Gunasekara,Saman Pushpa අප ජීවතවන ලෝකය - 03 මත්ස්යයෝ - S.Godage saha Sahodarayoo Colombo 10 2014 - 64p 1 - 2023-11-08 ISBN: 978-955-30-5434-0 Nat. Bib. No.: 0004480 Nat. Bib. Agency Control No.: GUN Universal Decimal Class. No.: 639.0