http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Manure management, regulations, and water quality protection
Manure handling,Farm manure,Water quality management,Xử lý phân bón,Canh tác phân bón,Quản lý chất lượng nước
Environmental aspects,Khía cạnh môi trường