Surathissa, D.M ප්රවේණී විද්යා Biology - Genetics - SMD Publisher Malabe 2019 - 96p 1 - 2024-03-04 ISBN: 978-955-51573-6-8 Nat. Bib. No.: 0006952 Nat. Bib. Agency Control No.: SUR Universal Decimal Class. No.: 540