http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
National Wetlands Research Center (U.S.)
Title from PDF title screen (viewed on June 7, 2005).
Mode of access: Internet from the USGS web site. Address as of 05/07/08: http://www.nwrc.usgs.gov/factshts/2004-3053.pdf ; current access is available via PURL.
Fact sheet (Geological Survey (U.S.)) ; 2004-3053