Samantha, N. P. G Issues in Big Onion Seed Production and Marketing - Colombo Hector Kobbekaduwa Agrarian Research and Training Institute 2013 - [2],vii,45 p. - Research Report : No. 150 . ISBN: 9789556121452 Subjects--Topical Terms: AGRARIAN RESEARCHAGRICULTUREHARTIONION SEEDPAMPHLET BOX 141