http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 volume ( various pagings) : digital, PDF file.
Title from PDF title screen (viewed on Apr. 23, 2007).
Mode of access: Internet from the USGS web site. Address as of 11/7/07: http://pubs.usgs.gov/of/2007/1091/ofr2007-1091.pdf ; current access via PURL.
U.S. Geological Survey open-file report ; 2007-1091