http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Also available via Internet from the USGS web site. Address as of 10-19-00: http://mapping.usgs.gov/mac/isb/pubs/factsheets/fs10800.html; current access is available via PURL.
Fact sheet (Geological Survey (U.S.)) ; FS-00-108