Department Of Education G.C.E. (advanced level) physics resource book; grade 12 unit 04-thermal physics - National Institute Of Education maharagamma 2020 - 84p 1 - 2023-11-22 ISBN: 978-955-654-899-0 Nat. Bib. No.: 0008441 Nat. Bib. Agency Control No.: EDU Universal Decimal Class. No.: 530