1. - M. Bone, Family planning services in England and;Wales England;London,1970
2. Coverage: m arried women aged 16-40 years. (Response rate from women was 86% .) G reat Britain 1967/68 - C. M. Langford Fertility and contraceptive practice in Great Britain forthcoming.
3. Total sample covered 2300 women in uninterrupted first marriages until age 45 (at time of interview) British
4. born with British husbands. The sub-samples analysed here are restricted to women married before the age
5. of 35. U.S.A. - C. F. Westoff T he modernization of U.S. contraceptive practice Family planning perspectives