Quality declared seed system : expert consultation, Rome 5-7 May 2003 : FAO Seed and Plant Genetic Resources Service. Food and Agriculture Organization of the United Nations. Seed technology Seeds Seed industry and trade 631 FOO 2006 A041 Or. Rome : Food and Agriculture Organization of the United Nations, 2006. 2006. Text ix, 243 p. ; http://www.loc.gov/catdir/toc/fy0702/2006484127.html