http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Also available via Internet from the Dept. of the Treasury web site. Addresss as of 5/18/04: http://www.ustreas.gov/offices/tax-policy/library/blueprints/full.pdf; current access is available via PURL.
Includes bibliographical references (pages 217-230).