Abeyadeera Nilmini / Abeydeera Padmini Methematics : Grade 11 - Samudara : Colombo ; 2017. - 238 p 22cm. 01 - 2024-06-25 ISBN: 9789556805147 Nat. Bib. No.: 0009847 Nat. Bib. Agency Control No.: ABE Universal Decimal Class. No.: 510