1. Cancer Facts & Figures, 1993;American Cancer Society,1993
2. Professional liability and its effects: Report of a 1987 survey of ACOG’s membership;American College of Obstetricians and Gynecologists,1988
3. Professional liability and its effects: Report of a 1992 survey of ACOG’s membership;American College of Obstetricians and Gynecologists,1992
4. 54 American Law Reports 4th,1987
5. DeBurkarte v Louvar, Iowa R.Civ.P.216, Iowa R.Civ.P. 243, Iowa R.Civ.P. 244, 393 N.W.2nd 131 (1986)