Gunasekara,Pushpa කෘමි ලෝකය - S.Godage Publishers Colombo 10 2014 - 56p 1 - 2023-11-22 ISBN: 978-955-30-5433-3 Nat. Bib. No.: 0004476 Nat. Bib. Agency Control No.: GUN Universal Decimal Class. No.: 638