1. Midforceps delivery: yes?;Friedman;Clin Obstet Gynecol,1987
2. Midforceps delivery: no?;Hayashi;Clin Obstet Gynecol,1987
3. Midforceps delivery: a critical review;Richardson;Am J Obstet Gynecol,1983
4. Obstetric forceps,1989
5. Comparison of maternal and fetal effects of vacuum extraction, forceps or cesarean deliveries;Cries;Obstet Gynecol,1981