http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Dùng cho học sinh các lớp chuyên bồi dưỡng học sinh giỏi (Bài tập tự luận và trắc nghiệm)
Ngô, Ngọc An, Phạm Thị Minh Nguyệt (Chủ biên)
Problems, exercises, etc.,Câu hỏi, bài tập