http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Tài liệu bồi dưỡng giáo viên thay sách giáo khoa môn toán lớp 10 phổ thông
Trường Đại học Sư phạm I Hà Nội
mathematics - study and teaching ( secondary )