http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Từ điển Anh - Việt Khoa học tự nhiên
Nguyễn Văn Mậu (chủ biên), Đào Huy Bích, Nguyễn Văn Hữu, Nguyễn Hữu Ngự