http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Sách giáo khoa thí điểm - Ban khoa học tự nhiên: Sách giáo viên
Nguyễn Thành Đạt (tổng ch.b)...[và nh. ng. khác]