1. Wilson, JG: Embryotoxicity of drugs in man, in Wilson JG, Fraser FC (eds): Handbook of Teratology. New York, Plenum Press, 1977, pp 309–355
2. World Health Organization: Methods for the detection of haemophilia carriers: A memorandum. Bull WHO 55: 567–702, 1977
3. Fraser, FC: The multifactorial threshold concept-uses and misuses. Teratology 14: 267–280, 1976
4. Hook, EB, Hamerton JL: The frequency of chromosome abnormalities detected in consecutive newborn studies-differences between studies-results by sex and by severity of phenotypic involvement, in Hook EB, Porter IH (eds): Population Cytogenetics. Studies in Humans. New York, Academic Press, 1977, pp 63–79
5. Hook, EB: Rates of chromosome abnormalities at different maternal ages. Obstet Gynecol 58: 282–285, 1981