http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Interim guidance on case definitions to be used for investigations of swine influenza A (H1N1) cases
Centers for Disease Control and Prevention (U.S.)
Title from title screen (viewed on May 1, 2009).
Mode of access: Internet from the CDC web site. Address as of 5/1/09: http://www.cdc.gov/h1n1flu/casedef%5Fswineflu.htm ; current access available via PURL.