1. Advance report of final natality statistics, 1993;Ventura;Mon Vital Stat Report,1995
2. Induction of labor. ACOG technical bulletin no. 217;American College of Obstetricians and Gynecologists,1995
3. Methods of cervical ripening and labor induction;Summers;J Nurse Midwifery,1997
4. Outpatient cervical ripening;Sawai;Clin Obstet Gynecol,1995
5. Induction of labor;Reichler;Curr Opin Obstet Gynecol,1995