Priyadarshana, Duminda An Analysis of Marketing Margins and Marketing Efficiency : Marketing Channels of Potato and Red Onion in Sri Lanka - Colombo Hector Kobbekaduwa Agrarian Research and Training Institute 2015 - [2],ix,59 p. - Research Report No : 187 . ISBN: 9789556121940 Subjects--Topical Terms: AGRARIAN RESEARCHHARTIPAMPHLET BOX 140POTATO