Working-party on greenhouse Chrysanthemum - Working-party on Greenhouse Chrysanthemum 1986) (Naaldwijk; Heij, Gerjan; de Lint, P. J. A. L.; International Society for Horticultural Science. Section for Ornamental Plants; International Society for Horticultural Science. Commission Protected Cultivation (Wageningen : International Society for Horticultural Science, 1987)