http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
occurrence of volatile organic compounds in aquifers of the United States
Title from PDF title screen (viewed on Apr. 21, 2008).
Includes text, 2 graphs, 3 tables, and 1 cross section.
Mode of access: Internet from the USGS web site. Address as of 4/21/08: http://pubs.usgs.gov/sim/2006/2931/pdf/sim2931.pdf ; current access via PURL.