http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Social Security definition of disability
Title from title screen (viewed on June 21, 2006).
Mode of access: Internet from the SSAB web site. Address as of 4/25/07: http://www.ssab.gov/sumrDefinitionDisability.shtml (abstract), http://www.ssab.gov/documents/SocialSecurityDefinitionOfDisability%5F002.pdf (PDF version); current access available via PURL.