http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Các hệ thống môi trường tự nhiên =
Environmental Management and Impact Assessment
Sách gồm 2 phần nói đến: Sinh thái học và các khái niệm cơ bản về hệ sinh thái; Sinh thái nhân văn.