Izumi, K.; Ranatunga, A.S.; Hector Kobbekaduwa Agrarian Research and Training Institute(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 1974)
Moore, M.P.; Wickramasinghe, G.; Hector Kobbekaduwa Agrarian Research and Training Institute(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 1978)
Moore, M.P.; Wickramasinghe, G.; Hector Kobbekaduwa Agrarain Research and Training Institute(Hector Kobbekaduwa Agrarain Research and Training Institute:Colombo, 1978)