Department of Scinece Physics;resource book;grade 12 ; unit 1:measurement;unit 2 mechanics - Department of Scinece Publisher Maharagama 2020 - 117p 1 - 2024-03-04 ISBN: 978-955-654-897-6 Nat. Bib. No.: 0009361 Nat. Bib. Agency Control No.: SCI Universal Decimal Class. No.: 540