http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Sleep duration, quality of sleep, and use of sleep medication, by sex and family type, 2013-2014
National Center for Health Statistics (U.S.)
1 online resource (8 pages) : color illustrations.
Title from title screen (viewed on Feb. 2, 2016).
Includes bibliographical references (pages 7-8).