http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Nhập môn lý thuyết, tập hợp và lôgíc
Tài liệu dùng cho các trường Cao đẳng sư phạm và các trường Sư phạm cấp hai 10+3