A.H.Danapala ප්රයෝගික භූගෝලවිද්යාව - Sarasawi Publisher nugegoda 2018 - 240p 1 - 2023-11-01 ISBN: 978-955-31-1150-0 Nat. Bib. No.: 0007553 Nat. Bib. Agency Control No.: DAN Universal Decimal Class. No.: 910