1. Prenatal diagnosis;Ferguson-Smith, M.A.;The Practitioner,1974
2. Chromosome analysis before birth and its value in genetic counselling Brit;Ferguson-Smith, M.E.; Ferguson-Smith, M.A.; Nevin, N.C.; Stone, M.;med. J,1971
3. Preventing the birth of infants with Down's syndrome: a cost-benefit analysis;Hagard, S.; Carter, F.A.;Brit. med. J,1976
4. Prenatal Diagnosis and Selective Abortion. Nuffield Provincial Hospitals Trust;Harris, H.,1974
5. Down's syndrome in Sweden;Lindsjo, A.;Acta paediat. scand,1974