1. Population Censuses and Surveys. General Household Survey 1989;Office of;OPCS Monitor,1990
2. Pulmonary embolism;Jordan, W.M.;Lancet,1961
3. Thrombo-embolic disease and the steroidal content of oral contraceptives. A report to the Committee on Safety of Drugs;Inman, W.H.W.; Vessey, M.P.; Westerholm, B.; Engelund, A.;BMJ,1970
4. Oral contraceptives and blood coagulation: a critical review;Mammen, E.F.;Am J Obstet Gynecol,1982
5. The Royal College of General Practitioners oral contraception study: some recent observations;Kay, C.R.;Clin Obstet Gynecol,1984