1. Cesarean childbirth,1981
2. An evaluation of cesarean section in the USA: a report and recommendations for the Office of the Secretary of Health;Marieskind,1980
3. Can mid-forceps operations be eliminated?;Taylor;Obstet Gynecol,1973
4. Patterns of labor as indicators of risk;Friedman;Clin Obstet Gynecol,1973
5. Current role of mid-forceps operation;Bowes;Clin Obstet Gynecol,1980