http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Cỏ dại trong ruộng lúa và biện pháp phòng trừ
Nguyễn Mạnh Chính và Mai Thành Phụng
plants, protection of,weeds - control,herbicides