http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Giáo trình công nghệ hàn:lý thuyết và ứng dụng
Nguyễn Thúc Hà, Bùi Văn Hạnh, Võ Văn Phong