1. A Survey of Mongoloid Births in Victoria, Australia, 1942-1957
2. Shift of childbirth to younger mothers, and its effect on the incidence of mongolism in Victoria, Australia, 1939–;1964;Collmann R. D.;J. ment. Defic. Res.,1969
3. Estimated rates of Down syndrome in live births by one year maternal age intervals for mothers aged 20–;49 in a New York State study: Implications of the risk figures for genetic counselling and cost‐benefit analysis of prenatal diagnosis programs;Hook E. B.;Birth Defects, Orig. Art. Ser.,1977
4. Down syndrome by single year maternal age interval in a Swedish study: Comparison with results from a New York study;Hook E. B.;Amer. J. hum. Genet.,1978