http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Tự học AutoCAD 14: Dùng cho thiết kế và vẽ kỹ thuật cơ khí - kiến trúc, xây dựng, điện - thiết kế
engineering drawing,autocad ( computer programs )