http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Bài giảng phần mềm hệ thống quản lí thông tin đất đai WinGIS
Trường Đại Học Cần Thơ - Khoa Nông Nghiệp
geographic information systems,information storage and retrieval systems - geography