Pushpawelage, Sampath ව්යාපාර අධ්යයනය - Samudhara Poth Prakashan Nugegoda 2014 - 286p 1 - 2023-11-02 ISBN: 978-955-680-333-4 Nat. Bib. No.: 0004603 Nat. Bib. Agency Control No.: PUS Universal Decimal Class. No.: 657