Food and Agriculture Organization of the United Nations. Plant Production and Protection Division. (1961). Agricultural and horticultural seeds: Their production,control and distribution. Food and Agriculture Organization of the United Nations.

Food and Agriculture Organization of the United Nations. Plant Production and Protection Division. Agricultural and Horticultural Seeds: Their Production,control and Distribution. Rome: Food and Agriculture Organization of the United Nations, 1961.

Food and Agriculture Organization of the United Nations. Plant Production and Protection Division. Agricultural and Horticultural Seeds: Their Production,control and Distribution. Food and Agriculture Organization of the United Nations, 1961.