http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
USGS national hydrography dataset newsletter
Description based on first issue ; title from title screen (viewed Apr. 4, 2008).
Latest issue consulted: volume 7, number 5 (Mar. 2008).
Mode of access: World Wide Web from the USGS web site. Address as of 3/4/08: http://nhd.usgs.gov/newsletter%5Flist.html ; current access via PURL.