5BettyWC,Helen VB.The American college of nurse-midwives'dream becomes reality:the division of accreditation[J].Midwifery WomensHealth,2005,50(1):146-153.
6Helen VB,Joyce ET.Genealogic origins of nurse-midwifery edu-cation programs in the United States[J].Midwifery Womens Health,2003,48(1):464-472.