http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Lê Văn Khoa, Nguyễn Xuân Cự, Lê Đức, Trần Khắc Hiệp, Trần Cẩm Vân
Sinh thái đất,Phì nhiêu đất B,Thổ nhưỡng B