http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"Most recent annual data available as of 6/15/2001."
Also available via Internet from the DOE Web site. Address as of 03/11/04: http://www.eia.doe.gov/neic/brochure/infocard00.htm; current access is available via PURL.