http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Bảo vệ sức khỏe nông dân và người tiêu dùng khỏi tác hại của thuốc trừ sâu
agricultural chemicals,agricultural pollution,agriculture - environmental aspects,pesticides,rural health