1. Thromboembolism and the pill-new data;Potts;IPPF Med Bull,1968
2. The distribution and supervision of oral contraceptives;IPPF Central Medical Committee;IPPF Med Bull,1973
3. Distribution and supervision of oral contraceptives;Smith;BMJ,1974
4. Report of The Joint Working Group on Oral Contraceptives,1976
5. The safety of oral contraceptives: epidemioligic insights from the past thirty years;Grimes;Am J Obstet Gynecol,1992