http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Một số văn bản về quản lý giống cây trồng
Bộ Nông nghiệp và phát triển nông thôn
Bộ Nông nghiệp và Phát triển Nông thôn
Collection and preservation,Sưu tầm và chọn giống