Iieperuma,O.A. Problems Solving In Chemistry For G.C.E. (AL) - Department Of Chemistry Peradeniya - 221p 1 - 2024-01-12 ISBN: 978-955-95574-3-2 Nat. Bib. No.: 0006721 Nat. Bib. Agency Control No.: IIE Universal Decimal Class. No.: 540