http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Thủy lực và máy thủy lực.Tập1.Thủy lực đại cương
Đại học và trung học chuyên nghiệp
Nguyễn Phước Hoàng, Phạm Đức Nhuần, Nguyễn Thạch Tân