Easvarathasam,R. G.C.E. Advanced Level Biology Practical Handbook - New Biology Publishers Colombo 2018 - 116p 1 - 2024-01-16 ISBN: 978-955-3821-1-0 Nat. Bib. No.: 0006605 Nat. Bib. Agency Control No.: EAS Universal Decimal Class. No.: 570