1. The Increase in the Cesarean Birth Rate
2. I. Chalmers, M. Richards, T. Chard, and M. Richards (1977 ) InBenefits and Hazards of The New Obstetrics (), Spastics International Medical Publications, Lavenham Press, Lavenham, pp.34 -61 .
3. P. W. Howie, T. Chard, and M. Richards (1977 ) InBenefits and Hazards of The New Obstetrics (), Spastics International Medical Publications, Lavenham Press, Lavenham, pp.83 -99 .
4. Caesarean section.