1. Endogenous hormones;Pike,1985
2. IARC Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans;IARC,1979
3. Breast cancer epidemiology;Kelsey;Cancer Res,1988
4. Strengths and Limitations of Epidemiology;MacMahan,1979
5. The pill at 20: an assessment;Ory;Fam Plann Pespect,1980