Vithanage , Ravindara සංයුක්ත ගණිතයට පදනම : - Author : Gampaha ; 2021. - 184 p; 24cm . 01 - 2024-10-02 ISBN: 9789554389007 Nat. Bib. No.: 0010691 Nat. Bib. Agency Control No.: VIT Subjects--Topical Terms: Combined Mathematics Universal Decimal Class. No.: 510