http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Giới thiệu bài giảng của giáo viên giỏi địa lý 6
Trần Xuân Nhĩ (tổng ch.b), Hoàng Thanh Huyền
Kho giáo trình KGT.0030835, KGT.0030836