Manjula Disanayaka ගිණුම්කරණය - Manjula Disanayaka Dehiwala 2019 - 78p 1 - 2023-11-15 ISBN: 978-955-54289-8-9 Nat. Bib. No.: 0007954 Nat. Bib. Agency Control No.: DIS Universal Decimal Class. No.: 510