Danapala,A.H උසස් පෙළ භූගෝලවිද්යාව - Sarasavi Publishers Nugegoda 2018 - 170p 1 - 2023-10-25 ISBN: 978-955-31-1357-3 Nat. Bib. No.: 0007551 Nat. Bib. Agency Control No.: DAN Universal Decimal Class. No.: 910