http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Also available via Internet from the GPO Access web site. Address as of 9/11/02: http://www.copyright.gov/circs/circ04.pdf; current access is available via PURL.
Circular (Library of Congress. Copyright Office) ; 4