http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Số liệu thống kê nông, lâm, ngư nghiệp Việt Nam ( 1976 - 1991 ) các vùng trọng điểm sản xuất hàng hóa
almanacs, vietnamese,economics - statistical methods,vietnam - economic conditions - 1976 - 1986