http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
National Heart, Lung, and Blood Institute
Title from title screen (viewed on Apr 6, 2006).
Mode of access: Internet from the EPA web site. Address as of 4/6/2006: http://www.nhlbi.nih.gov/health/public/sleep/healthy%5fsleep.pdf; current access available via PURL.