http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Sách tập hợp các câu hỏi về cây nhãn, vải như lợi ích kinh tế của hai cây trên , nguồn gốc, các kỹ thuật trồng, chăm sóc, nhân giống, thu hoach,...