http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Office of Transportation and Air Quality.
1 online resource (11 pages) : illustrations (some color)
Assessment and Standards Division, Office of Transportation and Air Quality, U.S. Environmental Protection Agency.
Title from title screen (viewed on December 12, 2013).
Includes bibliographical references (pages 5-6).