http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Sách là tài liệu tham khảo giúp giáo viên, học sinh trung học cơ sở có thêm tư liệu để dạy và học tốt hơn bộ môn Toán học.
Phan Đức Chính, Tôn Thân, Phạm Gia Đức