http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Lợi tức và sự phân phối lợi tức nông trại tại Phong Dinh 1973 - 1974
Viện Đại Học Cần Thơ - Đại Học Nông Nghiệp