Walpola, B.C ශාක පෝෂක = SHaaka pooshaka - Colombo: Godage, 2014. - 104p.; 22 cm. ISBN: 978-955-30-4964-3 Subjects--Topical Terms: Agri TecnologyPlantsAgriculture Dewey Class. No.: 338.1 / WAL