http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Frequently asked questions about emission control area application process
Office of Transportation and Air Quality.
United States Environmental Protection Agency, Office of Transportation and Air Quality.
Title from title screen (viewed on Feb. 3, 2009).
Mode of access: Internet from the EPA web site. Address as of 5/29/09: http://www.epa.gov/otaq/regs/nonroad/marine/ci/420f09001.pdf ; current access available via PURL.
Regulatory update (United States. Environmental Protection Agency. Office of Transportation and Air Quality)