http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Conceptual ecological models to support detection of ecological change on Alaska national wildlife refuges
1 online resource (vii, 136 pages) : illustrations (some color), color maps.
U.S. Geological Survey open-file report ; 2011-1085