http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
U.S. Department of Transportation, Federal Aviation Administration.
Some issues also available at the FAA web site. Address as of 2/25/03: http://nasdocs.faa.gov/nasiHTML/RED/index.html; current access is available via PURL.
National aviation research plan (Online)
United States. Federal Aviation Administration
Federal Aviation Administration plan for research, engineering, and development