Jayathilaka, W.D.W රසායන විද්යාව 3 කොටස - Sachinthaka Publisher Pannipitiya 2010 - 159p 1 - 2024-02-02 ISBN: 978-955-95144-5-9 Nat. Bib. No.: 0009106 Nat. Bib. Agency Control No.: JAY Universal Decimal Class. No.: 540