Pushpawelage, Sampath ව්යාපාර අධ්යයනය - Smudara Poth Prakashak Colombo - 105p 1 - 2023-11-06 ISBN: 978-955-680-436-2 Nat. Bib. No.: 0004600 Nat. Bib. Agency Control No.: PUS Universal Decimal Class. No.: 658