http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Emergency department use in the country's five most populous states and the total United States, 2012
National Center for Health Statistics (U.S.)
1 online resource (7 pages) : illustrations.
Includes bibliographical references (page 7).
National Ambulatory Medical Care Survey (U.S.)