http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Giáo trình lý thuyết chuyên môn: Nghề nguội sửa chữa bậc 3/7. Phần cơ bản: Các phương pháp gia công nguội cơ bản; đại cương về công nghệ chế tạo máy