http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Gíao trình vẽ kỹ thuật nghề: Sửa chữa thiết bị điện công nghiệp trình độ lành nghề( sách photo)
Bài 1: Khái niệm chung về bản vẽ cơ khí