http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Changes in cesarean delivery rates by gestational age
National Center for Health Statistics (U.S.)
1 online resource (8 unnumbered pages) : color illustrations.
Michelle J.K. Osterman and Joyce A. Martin.
Title from title screen (viewed on July 23, 2013).
Includes bibliographical references (pages 7-[8]).