Pushpawelage, Sampath අ.පො.ස උසස් පෙළ ආර්ථික විද්යාව = Usas pela aarthika vidhyaava keti satahan (Nava vishaya nirdeSHaya- 1 kotasa) - Colombo: Samudra Book, 2015. - 338p.; 24 cm. ISBN: 978-955-680-359-4 Subjects--Topical Terms: EconomicsEducation Dewey Class. No.: 330 / PUS