Abeydeera,Nilmini Mathematics Grade 11 part 2 - Samudra Book Publications Colombo 08 2016 - 267p 1 - 2023-11-27 ISBN: 978-955-680-816-2 Nat. Bib. No.: 0007760 Nat. Bib. Agency Control No.: ABE Universal Decimal Class. No.: 513.12