http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
considerations regarding 2009 H1N1 influenza in intrapartum and postpartum hospital settings
Centers for Disease Control and Prevention (U.S.)
"Content on this page was developed during the 2009-2010 H1N1 pandemic and has not been updated."